yii实现级联下拉菜单的方法

<&＃63;php
 echo $form->dropDownList($model, 'src_type_id', OrderSrc::options(), array(
  'id' => 'task-order-src-id',
 ));
 echo $form->dropDownList($model, 'src_shop_id', array(''=>'全部'), array(
  'id' => 'task-shop-id',
 ))
&＃63;>

public static function options($hasShop = true) {
 $model = new self();
 if($hasShop) $model->hasShop();
 $models = $model->findAll();
 $array = array(''=>'全部');
 foreach($models as $model) {
 $array[$model->src_id] = $model->src_name;
 }
 return $array;
}

public function actionGetShops() {
 $srcId = $_GET['srcId'];
 $array = ThirdpartInterfaceConfig::options($srcId);
 $htmlCOntent= "全部";
 foreach($array as $k=>$v) {
 $htmlContent .= "{$v}";
 }
 echo $htmlContent;
}