public function index()
{
//读取分类数据
$cate = M('category')->select();
$cate = levelArray($cate);
$this->cate = $cate;
$this->display();
}
/**
* 无限极分类数组(一维数组)
* 参数：原数组，初始父级id，每个分类的等级(用与显示缩进效果)，html--缩进符号
*/
function levelArray($array, $pid = 0, $level = 0)
{
$arr = array();
foreach ($array as $v) {
if ($v['pid'] == $pid) {
$v['level'] = $level;
$v['html'] = str_repeat('---', $level);
$arr[] = $v;
$arr = array_merge($arr, levelArray($array, $v['id'], $level + 1));
}
}
return $arr;
}