public function actionNavitem()
 {
     //一级菜单数据在下拉表中展示
     $nav = AgNav::find()->where(['status' => 1])->all();
     $bar = AgNavbar::find()->where(['status' => 1])->all();
     $data = AgNavitem::find()->with('nav', 'navbar');
     $pagination = new Pagination(['defaultPageSize' => 10, 'totalCount' => $data->count()]);
     $navitem = $data->orderBy('nid asc')->offset($pagination->offset)->limit($pagination->limit)->all();
     return $this->render('navitem', ['nav' => $nav, 'bar' => $bar, 'navitem' => $navitem, 'pagination' => $pagination]);
 }