diff --git a/application/config/treemenu.php b/application/config/treemenu.php
index 72a02947b..d2ee26546 100644
--- a/application/config/treemenu.php
+++ b/application/config/treemenu.php
@@ -27,3 +27,8 @@ $config['lvv'] = [
 	"library" => "treemenu/LvVwLib",
 	"permissions" => ["admin:r", "assistenz:r"]
 ];
+
+$config['tempus'] = [
+	"library" => "treemenu/TempusLib",
+	"permissions" => ["admin:r", "assistenz:r", "lehre/lvplan:r"]
+];
diff --git a/application/config/treemenu/custom/tempus.php b/application/config/treemenu/custom/tempus.php
new file mode 100644
index 000000000..977c0459e
--- /dev/null
+++ b/application/config/treemenu/custom/tempus.php
@@ -0,0 +1,32 @@
+<?php
+
+/**
+ * Copyright (C) 2026 fhcomplete.org
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+if (!defined('BASEPATH')) exit('No direct script access allowed');
+
+$config['root'] = [
+	'stg' => [
+		'semester' => [
+			'group',
+			'verband' => [
+				'group'
+			]
+		],
+		'orgform'
+	]
+];
diff --git a/application/controllers/api/frontend/v1/lv/StgTree.php b/application/controllers/api/frontend/v1/lv/StgTree.php
deleted file mode 100644
index e69de29bb..000000000
diff --git a/application/controllers/api/frontend/v1/tempus/Coursepicker.php b/application/controllers/api/frontend/v1/tempus/Coursepicker.php
index 686b39023..fd4ca5c75 100644
--- a/application/controllers/api/frontend/v1/tempus/Coursepicker.php
+++ b/application/controllers/api/frontend/v1/tempus/Coursepicker.php
@@ -154,7 +154,7 @@ class Coursepicker extends FHCAPI_Controller
 			}
 			$first = false;
 
-			$this->_ci->LehreinheitModel->db->where('tbl_lehrveranstaltung.studiengang_kz', $studiengang['studiengang_kz']);
+			$this->_ci->LehreinheitModel->db->where('tbl_lehrveranstaltung.studiengang_kz', $studiengang['stg_kz']);
 
 			if (isset($studiengang['semester']))
 				$this->_ci->LehreinheitModel->db->where('tbl_lehrveranstaltung.semester', $studiengang['semester']);
diff --git a/application/libraries/KalenderLib.php b/application/libraries/KalenderLib.php
index 643491839..8d5aa1a9a 100644
--- a/application/libraries/KalenderLib.php
+++ b/application/libraries/KalenderLib.php
@@ -412,7 +412,7 @@ class KalenderLib
 			foreach ($studiengaenge as $studiengang)
 			{
 				$conditions = array();
-				$conditions[] = 'filter_lv.studiengang_kz = ' . $db->escape($studiengang['studiengang_kz']);
+				$conditions[] = 'filter_lv.studiengang_kz = ' . $db->escape($studiengang['stg_kz']);
 
 				if (isset($studiengang['semester']))
 					$conditions[] = 'filter_lv.semester = ' . $db->escape($studiengang['semester']);
diff --git a/application/libraries/treemenu/TempusLib.php b/application/libraries/treemenu/TempusLib.php
new file mode 100644
index 000000000..75a8b2b1b
--- /dev/null
+++ b/application/libraries/treemenu/TempusLib.php
@@ -0,0 +1,148 @@
+<?php
+
+/**
+ * Copyright (C) 2026 fhcomplete.org
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Tempus Menu library
+ */
+class TempusLib
+{
+	protected $_ci = null;
+
+	public $config = [];
+
+	public function __construct()
+	{
+		// Get code igniter instance
+		$this->_ci =& get_instance();
+
+		// Load Tree-config
+		$this->_ci->load->config('treemenu/custom/tempus');
+		$this->config = $this->_ci->config->item('root');
+
+		// Load Libraries
+		$this->_ci->load->library('treemenu/base/StgLib');
+
+		// Load Model
+		$this->_ci->load->model('organisation/Studiengang_model', 'StudiengangModel');
+	}
+
+	public function stg($path_template)
+	{
+		$permittedStgs = $this->getPermittedStudiengangKzs();
+
+		if (!$permittedStgs)
+			return [];
+
+		return $this->_ci->stglib->studiengang($path_template, $permittedStgs);
+	}
+
+	public function semester($path_template, $has_children, $stg)
+	{
+
+		$stg = $this->getStgFromUrl($stg);
+
+		if ($stg === null)
+			return [];
+
+		if (!$has_children)
+			$this->_ci->StudiengangModel->db->select('TRUE AS leaf', false);
+
+		return $this->_ci->stglib->semester($path_template, $stg->studiengang_kz);
+	}
+
+	public function verband($path_template, $stg, $semester)
+	{
+		$stg = $this->getStgFromUrl($stg);
+
+		if ($stg === null)
+			return [];
+
+		$this->_ci->StudiengangModel->addSelect("CASE WHEN MAX(gruppe)='' OR MAX(gruppe)=' ' THEN TRUE ELSE FALSE END AS leaf");
+		$this->_ci->StudiengangModel->addGroupBy('v.studiengang_kz, v.semester');
+
+
+		return $this->_ci->stglib->verband($path_template, $stg->studiengang_kz, $semester);
+	}
+
+	public function group($path_template, $stg, $semester, $verband)
+	{
+		$stg = $this->getStgFromUrl($stg);
+
+		if ($stg === null)
+			return [];
+
+		$this->_ci->StudiengangModel->db->select('TRUE AS leaf', false);
+
+		if ($verband === null) {
+			$this->_ci->load->model('organisation/Gruppe_model', 'GruppeModel');
+			$this->_ci->GruppeModel->addSelect('semester');
+
+			return $this->_ci->stglib->group($path_template, $stg->studiengang_kz, $semester);
+		}
+
+
+		return $this->_ci->stglib->verbandsgroup($path_template, $stg->studiengang_kz, $semester, $verband);
+	}
+
+	public function orgform($path_template, $stg)
+	{
+		$stg = $this->getStgFromUrl($stg);
+
+		if ($stg === null)
+			return [];
+
+		if (!$stg->mischform)
+			return [];
+		
+		$this->_ci->StudiengangModel->db->select('TRUE AS leaf', false);
+
+		$this->_ci->load->model('organisation/Studienordnung_model', 'StudienordnungModel');
+		$this->_ci->StudienordnungModel->addSelect("p.orgform_kurzbz");
+
+		return $this->_ci->stglib->orgform($path_template, $stg->studiengang_kz);
+	}
+
+	protected function getPermittedStudiengangKzs()
+	{
+		$permittedStgs = $this->_ci->permissionlib->getSTG_isEntitledFor('admin') ?: [];
+		$permittedStgs = array_merge($permittedStgs, $this->_ci->permissionlib->getSTG_isEntitledFor('assistenz') ?: []);
+		$permittedStgs = array_merge($permittedStgs, $this->_ci->permissionlib->getSTG_isEntitledFor('lehre/lvplan') ?: []);
+		return $permittedStgs;
+	}
+
+	protected function getStgFromUrl($stg)
+	{
+		$permittedStgs = $this->getPermittedStudiengangKzs();
+
+		if (!$permittedStgs)
+			return null;
+
+		$this->_ci->StudiengangModel->db->where_in('studiengang_kz', $permittedStgs);
+		$stg = $this->_ci->StudiengangModel->loadWhere([
+			'LOWER(CONCAT(typ, kurzbz)) =' => $stg
+		]);
+
+		if (!hasData($stg))
+			return null;
+
+		return current(getData($stg));
+	}
+}
diff --git a/public/js/components/Tempus/Coursepicker.js b/public/js/components/Tempus/Coursepicker.js
index 95b8bbb5c..abf112356 100644
--- a/public/js/components/Tempus/Coursepicker.js
+++ b/public/js/components/Tempus/Coursepicker.js
@@ -103,8 +103,8 @@ export default {
 				return;
 			}
 
-			let payload = stg.map(({ studiengang_kz, semester, orgform_kurzbz }) => ({
-				studiengang_kz,
+			let payload = stg.map(({ stg_kz, semester, orgform_kurzbz }) => ({
+				stg_kz,
 				semester,
 				orgform_kurzbz
 			}));
diff --git a/public/js/components/Tempus/Filters/VerbandSelection.js b/public/js/components/Tempus/Filters/VerbandSelection.js
index ec51d563a..122897047 100644
--- a/public/js/components/Tempus/Filters/VerbandSelection.js
+++ b/public/js/components/Tempus/Filters/VerbandSelection.js
@@ -20,13 +20,14 @@ export default {
 			}
 			else
 			{
-				this.$emit('update:studiengaenge', this.studiengaenge.filter(studiengang => !(studiengang.studiengang_kz === stg_kz && studiengang.semester === semester && studiengang.orgform_kurzbz === orgform_kurzbz)));
+				this.$emit('update:studiengaenge', this.studiengaenge.filter(studiengang => !(studiengang.stg_kz === stg_kz && studiengang.semester === semester && (!orgform_kurzbz || studiengang.orgform_kurzbz === orgform_kurzbz))));
 			}
 		},
 		stgLabel(stg)
 		{
-			let found = this.studiengaengeAll.find(s => s.studiengang_kz == stg.studiengang_kz);
-			let name = found?.name ?? stg.studiengang_kz;
+			let found = this.studiengaengeAll.find(s => s.studiengang_kz == stg.stg_kz);
+			let name = found?.name ?? stg.stg_kz;
+
 
 			if (stg.orgform_kurzbz)
 				return `${name} - ${stg.orgform_kurzbz}`;
@@ -56,7 +57,7 @@ export default {
 					<button
 						type="button"
 						class="btn btn-sm btn-link text-danger p-0"
-						@click="removeStg(studiengang.studiengang_kz, studiengang.semester, studiengang.orgform_kurzbz)"
+						@click="removeStg(studiengang.stg_kz, studiengang.semester, studiengang.orgform_kurzbz)"
 						title="Studiengang entfernen"
 					>
 						<i class="fa-solid fa-xmark"></i>
diff --git a/public/js/components/Tempus/Tempus.js b/public/js/components/Tempus/Tempus.js
index 360c198d7..cfbdf22f7 100644
--- a/public/js/components/Tempus/Tempus.js
+++ b/public/js/components/Tempus/Tempus.js
@@ -34,7 +34,8 @@ import AppConfig from "../AppConfig.js";
 
 import BsModal from "../Bootstrap/Modal.js";
 
-import StvVerband from "../Stv/Studentenverwaltung/Verband.js";
+import BaseTreemenu from '../Base/Treemenu.js';
+
 import ApiStudiengangTree from "../../api/factory/tempus/studiengangtree.js";
 import ApiInfo from "../../api/factory/tempus/info.js";
 import StvStudiensemester from "../Stv/Studentenverwaltung/Studiensemester.js";
@@ -63,7 +64,7 @@ export default {
 		AppMenu,
 		NavLanguage,
 		BsModal,
-		StvVerband,
+		BaseTreemenu,
 		StvStudiensemester,
 		Multiselect: primevue.multiselect,
 		FormInput,
@@ -281,29 +282,23 @@ export default {
 			this.rooms = [{ ort_kurzbz: data.ort_kurzbz }];
 		},
 		onSelectVerbandAndClose(payload) {
-			console.log(payload);
 			this.onSelectVerband(payload);
 			bootstrap.Offcanvas.getOrCreateInstance(this.$refs.verbandMenu).hide();
 		},
 
-		onSelectVerband({ link, studiengang_kz, semester, orgform_kurzbz, name }) {
-			if (orgform_kurzbz) {
-				semester = null;
-			} else if (typeof link === "string") {
-				[studiengang_kz, semester] = link.split("/");
-			}
+		onSelectVerband({ path, stg_kz, semester, orgform_kurzbz, name }) {
 
 			let exists = this.studiengaenge.some(
 				(stg) =>
-					stg.studiengang_kz == studiengang_kz &&
+					stg.stg_kz == stg_kz &&
 					stg.semester == semester &&
-					stg.orgform_kurzbz === orgform_kurzbz,
+					(!orgform_kurzbz || stg.orgform_kurzbz === orgform_kurzbz),
 			);
 
 			if (!exists) {
 				this.studiengaenge = [
 					...this.studiengaenge,
-					{ studiengang_kz, semester, orgform_kurzbz, name },
+					{ stg_kz, semester, orgform_kurzbz, name },
 				];
 			}
 		},
@@ -408,8 +403,8 @@ export default {
 			if (hasRooms) filter.ort = this.rooms.map((room) => room.ort_kurzbz);
 			if (hasStg) {
 				filter.stg = this.studiengaenge.map(
-					({ studiengang_kz, semester, orgform_kurzbz }) => ({
-						studiengang_kz,
+					({ stg_kz, semester, orgform_kurzbz }) => ({
+						stg_kz,
 						semester,
 						orgform_kurzbz,
 					}),
@@ -1276,7 +1271,7 @@ export default {
 				</h5>
 				<button type="button" class="btn-close text-reset" data-bs-dismiss="offcanvas" :aria-label="$p.t('ui/schliessen')"></button>
 			</div>
-			<stv-verband :endpoint="endpoint" @select-verband="onSelectVerbandAndClose" class="col" style="height:0%"></stv-verband>
+			<base-treemenu config="tempus" @select-entry="onSelectVerbandAndClose" class="col" style="height:0%"></base-treemenu>
 		</div>
 
 		<raumauswahl-modal ref="raumModal" @saved="$refs.calendar.resetEventLoader()"/>