Yii - 连动下拉菜单，可多级哦

视图文件

/* * 取会员组信息  */   public function getMemGroup($type=null){   if($type==null){   $criteria=new CDbCriteria;   $criteria->compare('type','1');   $memGroup = MemGroup::model()->findAll($criteria);   return CHtml::listData($memGroup,'zmg_id','zmg_title');   }else{   $level = $this->getMemGroup();   if(array_key_exists($type,$level)){   return $level[$type];   }   }   }