diff --git a/frontend/views/layouts/main-menu.php b/frontend/views/layouts/main-menu.php
index 02bb018..831edb8 100644
--- a/frontend/views/layouts/main-menu.php
+++ b/frontend/views/layouts/main-menu.php
@@ -5,9 +5,10 @@ use yii\widgets\Menu;
 
 
 foreach (Category::find ()->all () as $category){
+ $categoryObject = Yii::$app->request->get('category');
  $menu[] = ['label' => $category->name ,
      'url' => Url::to(['catalog/category', 'category' => $category]),
-     'active' => Yii::$app->request->get('category')->alias == $category->alias ? true : false ];
+     'active' => isset($categoryObject) && Yii::$app->request->get('category')->alias == $category->alias ? true : false ];
 }
 
 $main_menu = Menu::widget([
--
libgit2 0.21.4