TP5 无限分类

// 无限分类
function cateSort($data, $fid = 0, $count = 0)
{
    static $arr = [];
    foreach ($data as $k => $v) {
        if ($v['fid'] == $fid)
        {
            $v['count'] = $count;
            $arr[] = $v;
            unset($data['$k']);
            cateSort($data, $v['id'], $count + 1);
        }
    }
    return $arr;
}