无限极分类php

public function Infinite(){
        $data=$this->SortRepositorie->sate();//查出的分类数据
        /*
        * 商品分类数据
        */
        $array = $this->getTree($data);
//        print_r($array);die;
        return $array;
    }
//无极限分类
    public function getTree($data,$pid=0){
        $arr=array();
        foreach($data as $key=>$value){
            if($value['pid']==$pid){
                $arr[$key]=$value;
                $arr[$key]['chid']=$this->getTree($data,$value['id']);
            }
        }
        return $arr;
    }