gx

@@ -96,8 +96,8 @@ class BlogController extends BaseController
             if(!empty($category_id)){
                 $categoryModel = new BlogCategory();
                 $category_name_arr = $categoryModel->formatQuery(['category_id'=>['in',$category_id]])->pluck('name')->toArray();
+                $str = explode(',',$category_name_arr);
             }
-            $str = explode(',',$category_name_arr);
         }
         return $str;
     }