public function deleteCollection($id)
 {
     if (Request::ajax()) {
         $arrReturn = ['status' => 'error', 'message' => 'Please refresh and try again.'];
         try {
             $collection = Collection::findorFail($id);
         } catch (Illuminate\Database\Eloquent\ModelNotFoundException $e) {
             return App::abort(404);
         }
         $name = $collection->name;
         if ($collection->delete()) {
             $arrReturn = ['status' => 'ok', 'message' => "Collection <b>{$name}</b> has been deleted."];
         }
         $response = Response::json($arrReturn);
         $response->header('Content-Type', 'application/json');
         return $response;
     }
     return App::abort(404);
 }