public function getCategoryTree($pid=0,$t=-1)
{
$t++;
static $cat_temp;
$data = M('keywords_categroy')->findAll(array('pid'=>$pid),'id ASC, category');
if(!empty($data))
{
foreach ($data as $key => $val )
{
$val['category'] = str_repeat(' ',$t*3).'├'.$val['category'];
$val['level'] = $t+1;
$cat_temp[] = $val;
$this -> getCategoryTree($val['id'],$t);
}
}
return $cat_temp;
}