/**
  * 编辑关键词
  */
 public function actionEdit()
 {
     $id = $this->helpGquery('id', '');
     if (!$id) {
         return $this->redirect('index');
     }
     $department = new Department();
     $data['class_level1'] = $department->getlevel1();
     $keywords = Keywords::findOne($id);
     $disease = Disease::findOne($keywords['disease_id']);
     if ($keywords) {
         $keywords = $keywords->toArray();
     }
     if ($disease) {
         $disease = $disease->toArray();
     }
     $data['keywords'] = $keywords;
     $data['disease'] = $disease;
     return $this->render('edit', $data);
 }