php递归处理无限极数据

<?php
header('content-type: text/html; charset=utf-8');
$array=Array(
	Array('tid' => 1,'tname' => "新手指南",'pid' => 0), 
	Array('tid' => 2, 'tname' => "购物常识",'pid' => 0),
	Array( 'tid' => 3,'tname' => "配送与支付", 'pid' => 0),
	Array('tid' => 4, 'tname' => "服务与保障",'pid' => 0),
	Array( 'tid' => 5, 'tname' => "单页管理",'pid' => 0),
	Array('tid' => 6,'tname' =>" 网站新闻",'pid' => 0),
	Array('tid' => 7,'tname' => "网站公告",'pid' => 0),
	Array('tid' => 8, 'tname' => "test",'pid' => 0 ),
	Array('tid' => 10,'tname' => "售后流程",'pid' => 1),
	Array('tid' => 11,'tname' => "购物流程",'pid' => 1),
	Array('tid' => 12,'tname' => "订购方式",'pid' => 1),
	Array('tid' => 13,'tname' => "如何分辨原装电池 ",'pid' => 2),
	Array('tid' => 14, 'tname' => "如何辨别水货手机", 'pid' => 2),
	Array('tid' => 15,'tname' => "如何享受全国联保",'pid' => 2),
	Array('tid' => 16, 'tname' => "货到付款区域", 'pid' => 3),
	Array('tid' => 17,'tname' => "配送支付智能查询",'pid' => 3),
	Array('tid' => 18,'tname' => "支付方式说明",'pid' => 3),
	Array('tid' => 19,'tname' => "关于我们",'pid' => 5 ),
	Array('tid' => 20,'tname' => "商品促销文章",'pid' => 6),
	Array('tid' => 21, 'tname' => "公司新闻", 'pid' => 6),
	Array('tid' => 22,'tname' =>"商品公告",'pid' => 7),
	Array('tid' => 23,'tname' => "销售公告",'pid' => 7),
	Array('tid' => 24, 'tname' => "日常公告", 'pid' => 7)
);
function actionClassData($data,$pid=0){
	$new_data = array();
	$arr = array();
	foreach($data as $key=>$val){
		if($val['pid']==$pid){//当pid为0的话是个新的
			$arr = $val;
			unset($data[$key]);
			$arr1 = actionClassData($data,$arr['tid']);
			/*
			foreach($data as $key1=>$val1){
				if($val1['pid']==$arr['tid']){
					$arr['list'][] = $val1;
					unset($data[$key1]);
				}
			}*/
			$arr['list'] = $arr1;
			$new_data[] = $arr;
		}
	}
	return $new_data;
}

print_r(actionClassData($array));