CI框架（无限级分类+递归）

//无级分类+递归

public function digui(){

$crr = $this->db->get('category')->result_array();

$list['type'] = $this->nolimit($crr,0,0);

$this->load->view('list1',$list);

}

public function nolimit($crr,$p_id,$level){

static $arr = array();

foreach($crr as $v){

if($v['parent_id']==$p_id){

$v['level'] = $level;

$arr[] = $v;

$this->nolimit($crr,$v['cat_id'],$level+1);

}

}

return $arr;

}

<td><?PHP echo str_repeat('    ',$val['level'])?><?php echo
$val['cat_name']?></td>

//获取1级、2级、3级分类

public function sel_child($p_id){

$arr = $this->sel_son($p_id);

foreach($arr as $k=>$v){

$tmp = $this->sel_son($v['cat_id']);

foreach($tmp as $kk=>$vv){

$tmp2 = $this->sel_son($vv['cat_id']);

$tmp[$kk]['childs'] = $tmp2;

}

$arr[$k]['child'] = $tmp;

}

return $arr;

}
//通过ID获取所有的下级分类

public function sel_son($id){

$this->db->where("parent_id=$id");

return $this->db->get(self::$cate)->result_array();

}

//渲染展示主页模板

public function lists(){

$p_id = 0;

$brr['type'] = $this->Home_model->sel_child($p_id);

$brr['list'] = $this->db->get('goods')->result_array();

$this->load->view('Home/list.html',$brr);

}

<?php foreach($type as $v){?>

<li id="cat_1" class="">

<h3><a href=""><?php echo $v['cat_name']?></a></h3>

<?php foreach($v['child'] as $vv){?>

<dl class="clearfix">

<dt><a href=""><?php echo $vv['cat_name']?></a></dt>

<?php foreach($vv['childs'] as $vvv){?>

<a href=""><?php echo $vvv['cat_name']?></a>

<?php }?>

</dl>

<?php }?>

</li>

<?php }?>