递归

function getTree($data, $pId)
{
$html = '';
foreach($data as $k => $v)
{
  if($v['cate_ParentId'] == $pId)
  {        //父亲找到儿子
   $html .= "<li>".$v['cate_Name'];
   $html .= getTree($data, $v['cate_Id']);
   $html = $html."</li>";
  }
}
return $html ? '<ul>'.$html.'</ul>' : $html ;
}
echo getTree($data, 0);