diff --git a/Controller/BackendController.php b/Controller/BackendController.php
index 3de7ee3..db96760 100644
--- a/Controller/BackendController.php
+++ b/Controller/BackendController.php
@@ -45,7 +45,7 @@ final class BackendController extends Controller
     {
         $view = new View($this->app->l11nManager, $request, $response);
         $view->setTemplate('/Modules/ResearchDevelopment/Theme/Backend/rnd-list');
-        $view->addData('nav', $this->app->moduleManager->get('Navigation')->createNavigationMid(1002202001, $request, $response));
+        $view->data['nav'] = $this->app->moduleManager->get('Navigation')->createNavigationMid(1002202001, $request, $response);
 
         return $view;
     }
@@ -66,7 +66,7 @@ final class BackendController extends Controller
     {
         $view = new View($this->app->l11nManager, $request, $response);
         $view->setTemplate('/Modules/ResearchDevelopment/Theme/Backend/rnd-create');
-        $view->addData('nav', $this->app->moduleManager->get('Navigation')->createNavigationMid(1002202001, $request, $response));
+        $view->data['nav'] = $this->app->moduleManager->get('Navigation')->createNavigationMid(1002202001, $request, $response);
 
         return $view;
     }
diff --git a/Theme/Backend/rnd-create.tpl.php b/Theme/Backend/rnd-create.tpl.php
index 041d6f9..8e77f37 100644
--- a/Theme/Backend/rnd-create.tpl.php
+++ b/Theme/Backend/rnd-create.tpl.php
@@ -12,7 +12,7 @@
  */
 declare(strict_types=1);
 
-echo $this->getData('nav')->render(); ?>
+echo $this->data['nav']->render(); ?>
 
 <section class="box w-50">
     <header><h1><?= $this->getHtml('Project'); ?></h1></header>
diff --git a/Theme/Backend/rnd-list.tpl.php b/Theme/Backend/rnd-list.tpl.php
index 3d51582..274b83f 100644
--- a/Theme/Backend/rnd-list.tpl.php
+++ b/Theme/Backend/rnd-list.tpl.php
@@ -23,7 +23,7 @@ $footerView->setPages(25);
 $footerView->setPage(1);
 $footerView->setResults(1);
 
-echo $this->getData('nav')->render(); ?>
+echo $this->data['nav']->render(); ?>
 
 <div class="row">
     <div class="col-xs-12">
@@ -41,9 +41,9 @@ echo $this->getData('nav')->render(); ?>
                 <tr><td colspan="5">
                 <tbody>
                 <?php $c = 0; foreach ([] as $key => $value) : ++$c;
-                $url     = \phpOMS\Uri\UriFactory::build('{/prefix}checklist/single?{?}&id=' . $value->getId()); ?>
+                $url     = \phpOMS\Uri\UriFactory::build('{/prefix}checklist/single?{?}&id=' . $value->id); ?>
                 <tr>
-                    <td><a href="<?= $url; ?>"><?= $this->printHtml($value->getId()); ?></a>
+                    <td><a href="<?= $url; ?>"><?= $this->printHtml($value->id); ?></a>
                     <td><a href="<?= $url; ?>"><?= $this->printHtml($value->getName()); ?></a>
                     <td><a href="<?= $url; ?>"><?= $this->printHtml($value->getParent()); ?></a>
                     <td><a href="<?= $url; ?>"><?= $this->printHtml($value->getUnit()); ?></a>