public function addNavProcess()
 {
     $nav = new NavigationModel();
     if ($vo = $nav->create()) {
         //dump($vo);exit;
         $list = $nav->add();
         if ($list !== false) {
             $this->success('数据保存成功!');
         } else {
             $this->error('数据写入错误!');
         }
     } else {
         $this->error($nav->getError());
     }
 }