Yii Framework框架获取分类下面的所有子类方法

static function getmenutree($arrcat, $parent_id = 0, $level = 0,$all=true)
 {
  static $arrtree; //使用static代替global
  if(!$all) $arrtree ='';
  if( empty($arrcat)) return false;
  $level++;
  if($level == 1) $arrtree[] = $parent_id;
  foreach($arrcat as $key => $value)
  {
   if($value['parent_cid' ] == $parent_id)
   {
    //$value[ 'level'] = $level;
    $arrtree[] = $value['cid'];
    unset($arrcat[$key]); //注销当前节点数据，减少已无用的遍历
    self::getmenutree($arrcat, $value[ 'cid'], $level);
   }
  }
  return $arrtree;
 }

public function actionindex2()
 {
 $filepath = yii::getpathofalias('application').'/data/';
 $arr = array();
 $db = yii::app()->db;
 $listinfo = $db->createcommand("select name,cid,parent_cid,root_cid from item_cat_info")->queryall();
 foreach($listinfo as $val)
 {
   $arr[$val['cid']] = array('cid'=>$val['cid'],'name'=>$val['name'],'parent_cid'=>$val['parent_cid'],'root_cid'=>$val['root_cid']);
 }

 $applist = "<?phpnreturn ".var_export($arr, true).";n?>";
 file_put_contents($filepath.'itemcat.php', $applist);
  }