public static function childList2($obj, $pid = 0)
{
$list = array();
foreach ($obj as $v) {
if ($v->pid == $pid) {
//找到子节点,继续找该子节点的后代节点
$v->child = Tools::childList2($obj, $v->id);
$list[] = $v;
}
}
return $list;
}
