$items
=
array
(
1 =>
array
('id' => 1, 'pid' => 0, 'name' => '江西省'),
2 =>
array
('id' => 2, 'pid' => 0, 'name' => '黑龙江省'),
3 =>
array
('id' => 3, 'pid' => 1, 'name' => '南昌市'),
4 =>
array
('id' => 4, 'pid' => 2, 'name' => '哈尔滨市'),
5 =>
array
('id' => 5, 'pid' => 2, 'name' => '鸡西市'),
6 =>
array
('id' => 6, 'pid' => 4, 'name' => '香坊区'),
7 =>
array
('id' => 7, 'pid' => 4, 'name' => '南岗区'),
8 =>
array
('id' => 8, 'pid' => 6, 'name' => '和兴路'),
9 =>
array
('id' => 9, 'pid' => 7, 'name' => '西大直街'),
10 =>
array
('id' => 10, 'pid' => 8, 'name' => '东北林业大学'),
11 =>
array
('id' => 11, 'pid' => 9, 'name' => '哈尔滨工业大学'),
12 =>
array
('id' => 12, 'pid' => 8, 'name' => '哈尔滨师范大学'),
13 =>
array
('id' => 13, 'pid' => 1, 'name' => '赣州市'),
14 =>
array
('id' => 14, 'pid' => 13, 'name' => '赣县'),
15 =>
array
('id' => 15, 'pid' => 13, 'name' => '于都县'),
16 =>
array
('id' => 16, 'pid' => 14, 'name' => '茅店镇'),
17 =>
array
('id' => 17, 'pid' => 14, 'name' => '大田乡'),
18 =>
array
('id' => 18, 'pid' => 16, 'name' => '义源村'),
19 =>
array
('id' => 19, 'pid' => 16, 'name' => '上坝村'),
20 =>
array
('id' => 20, 'pid' => 0, 'name' => '广东省'),
21 =>
array
('id' => 21, 'pid' => 20, 'name' => '广州市'),
);
$t
=
array
();
foreach
(
$items
as
$id
=>
$item
) {
if
(
$item
['pid']) {
$items
[
$item
['pid']][
$item
['id']] = &
$items
[
$item
['id']];
$t
[] =
$id
;
}
}
foreach
(
$t
as
$u
) {
unset(
$items
[
$u
]);
}
echo
"<pre class="
brush:php;toolbar:false
">"
;
print_r(
$items
);