city.php

<?php
header("Content-Type:text/html;charset=utf-8");
$city = array(
	array('id' => 1,'name' => '北京',"pid" => 0),
	array('id' => 2,'name' => '广东',"pid" => 0),
	array('id' => 3,'name' => '海淀区',"pid" => 1),
	array('id' => 4,'name' => '昌平区',"pid" => 1),
	array('id' => 5,'name' => '上地',"pid" => 3),
	array('id' => 6,'name' => '西二旗',"pid" => 3),
	array('id' => 7,'name' => '回龙观',"pid" => 4),
	array('id' => 8,'name' => '霍营',"pid" => 4),
	array('id' => 9,'name' => '深圳',"pid" => 2),
	array('id' => 10,'name' => '广州',"pid" => 2),
	array('id' => 11,'name' => '福田',"pid" => 9),
	array('id' => 12,'name' => '南山',"pid" => 9),
);

echo "<pre>";
var_dump($city);


$res = array(
	array('id' => 1,'name' => '北京',"pid" => 0),
	array('id' => 3,'name' => '海淀区',"pid" => 1),
	array('id' => 5,'name' => '上地',"pid" => 3),
	array('id' => 6,'name' => '西二旗',"pid" => 3),
	array('id' => 4,'name' => '昌平区',"pid" => 1),
	array('id' => 7,'name' => '回龙观',"pid" => 4),
	array('id' => 8,'name' => '霍营',"pid" => 4),
	array('id' => 2,'name' => '广东',"pid" => 0),
	array('id' => 9,'name' => '深圳',"pid" => 2),
	array('id' => 11,'name' => '福田',"pid" => 9),
	array('id' => 12,'name' => '南山',"pid" => 9),
	array('id' => 10,'name' => '广州',"pid" => 2),
	
);