输出：

学生模块

——学生管理

——添加学生

栏目模板

——管理栏目

用户模块

——用户管理

——————用户管理

——————添加用户

——分组管理

图标模块

——图标模块

系统设置

——学校模块

——————学校管理

——————增加学校

——后台首页

——合作单位

——————合作单位管理

——————增加合作单位

——上报教学站点

——————站点管理

——————添加站点

模板代码：

{volist name="name" id="vo"}
    <div>
        <span>{$vo.title}</span>
    </div>
    {volist name="vo.child" id="vo2"}
    <div>
        <span>——{$vo2.title}</span>
				    {volist name="vo2.child" id="vo3"}
				    <div>
				        <span>——————{$vo3.title}</span>
				    </div>
				    {/volist}
    </div>
    {/volist}
{/volist}

tp5 控制器PHP代码：

1、以静态数组的办法

        $data=[
            ["id"=>22,
            "user" => "houn",
            "pid"=>0,
            "child"=>[
	                    [
	                        "id"=>22,
	                        "user" => "baichi",
	                        "pid"=>0,
			                "child"=>[
					                    [
					                        "id"=>22,
					                        "user" => "baichi03",
					                        "pid"=>0,
					                    ],
					                    [
					                        "id"=>22,
					                        "user" => "baichi03",
					                        "pid"=>0,
					                    ],
			                         ]
	                    ],
	                    [
	                        "id"=>22,
	                        "user" => "baichi",
	                        "pid"=>0,
	                    ],
                     ]
            ],
            ["id"=>22,
                "user" => "houn",
                "pid"=>0,
                "child"=>""
            ],
            ["id"=>22,
                "user" => "houn",
                "pid"=>0,
	            "child"=>[
		                    [
		                        "id"=>22,
		                        "user" => "12baichi",
		                        "pid"=>0,
				                "child"=>[
						                    [
						                        "id"=>22,
						                        "user" => "21baichi03",
						                        "pid"=>0,
						                    ],
						                    [
						                        "id"=>22,
						                        "user" => "21baichi03",
						                        "pid"=>0,
						                    ],
				                         ]
		                    ],
		                    [
		                        "id"=>22,
		                        "user" => "baichi",
		                        "pid"=>0,
		                    ],
	                     ]
            ],
       ];
        $this->assign('name',$data);

2、读取数据库形式  TP5 php代码

			//循环列出栏目数据 1级
			$res = Db::name('menu')->where('flid',1)->order('uid desc')->select();
			$data="";
			foreach($res as $k => $v){
				            //2级
							$res2 = Db::name('menu')->where("pid",$v['id'])->select();
							$data2="";
							foreach($res2 as $k2 => $v2){
										            //3级
													$res3 = Db::name('menu')->where("pid",$v2['id'])->select();
													$data3="";
													foreach($res3 as $k3 => $v3){
														$data3[$k3]['id']=$v3['id'];
														$data3[$k3]['title']=$v3['title'];
														$data3[$k3]['child']=$v3['title'];								
													}
								
								$data2[$k2]['id']=$v2['id'];
								$data2[$k2]['title']=$v2['title'];
								$data2[$k2]['child']=$data3;								
							}
				
				$data[$k]['id']=$v['id'];
				$data[$k]['title']=$v['title'];
				$data[$k]['child']=$data2;
				
			}
        $this->assign('name',$data);

进阶例子：

			$where = new Where;
		    if($state){
				$where['state'] = $state-1;
			}
		    if($search){
				$where['number'] = ['like', "%".$search."%"]; 
			}
			$where['deleted'] = 0;
			$where['user_id'] = $Session['user_id'];
			$list =  Db::name('order')
				->field('id,number,price,type,state,time,pay_time')
				->where($where)
				->order(['id' => 'desc'])
				->paginate(10,false,['query' => request()->param(),'type' => 'page\Page','var_page'  => 'page']);
			if(!empty($list)){
				foreach($list as $k => $v){
					$oprs = Db::name('order_product')->field('id,title,num,price,pid,controller,img')->where('number',$v['number'])->select();
					if(!empty($oprs)){
						foreach($oprs as $k2 => $v2){
							if($v2['controller']=='Combination'){//组合
								$p_list=  Db::name('order_product_clist')->field('id,title,controller,price,img,type_mold,num,pid')->where('opid',$v2['id'])->select();
								if(!empty($p_list)){
									$cbrs=[];
									foreach($p_list as $k3=> $v3){
										// //$price31 +=$v3['price'];
										$cbrs[$k3]['id']=$v3['pid'];
										$cbrs[$k3]['title']=$v3['title'];
										// //$cbrs['price']=$v3['price'];
										$cbrs[$k3]['img']=$v3['img']?\app\admin\model\Common::file_url($v3['img']):$this->system_config['system_index_no_img'];
										   if($v3['controller']=='Live'){
										   	   $ttt="直播";
										   }elseif($v3['controller']=='Video'){
										   	   $ttt="点播";
										   }elseif($v3['controller']=='Testpaper'){
										   	   $ttt="试卷";
										   }elseif($v3['controller']=='Shop'){
										   	    $ttt="商城";
										   }else{
										   	    $ttt="其它";
										   }
										$cbrs[$k3]['controller']=$v3['controller'];
										$cbrs[$k3]['type_title']=$ttt;
									}
								}else{
									$cbrs=[];
								}
							}
							if($v2['controller']=='Testpaper'){//试卷  试卷ID要加密
								//$v2['id'] = 21;
								$v2['pid'] = model('index/CommonModel')->lock_url($v2['id'],'id');
							}else{
								$v2['pid'] =$v2['pid'];
							}
							if($v2['controller']=='Live'){
								$type_title1='直播';
							}elseif($v2['controller']=='Video'){
								$type_title1='点播';
							}elseif($v2['controller']=='Testpaper'){
								$type_title1='试卷';
							}elseif($v2['controller']=='Shop'){
								$type_title1='商品';
							}elseif($v2['controller']=='Combination'){
								$type_title1='组合';
							}else{
								$type_title1='商品';
							}
							$v2['type_title']=$type_title1;
							$v2['img'] =$v2['img']?\app\admin\model\Common::file_url($v2['img']):$this->system_config['system_index_no_img'];
							$v2['child'] =$cbrs;
							$oprs[$k2] = $v2;
						}
					}else{
						$oprs=[];
					}
					$v['child'] =$oprs;
					$list[$k] = $v;
				}
			}