WordPress当前页面调用上下级分类目录

            $current = "";
        if(is_single()){
            $parent = get_the_category();
            $parent = $parent[0];
            $current = "¤t_category=".$parent->term_id;
        }else if(is_category()){
            global $cat;
            $parent = get_category($cat);
        }
        if($parent->category_parent != 0){
            $cat_id = $parent->category_parent;
            $parent = get_category($cat_id);
            if($parent->category_parent != 0){
                $cat_id = $parent->category_parent;
            }else{
                $cat_id = $parent->term_id;
            }
        }else{
            $cat_id = $parent->term_id;
        }
    ?>
   
       

cat_name; ?>slug; ?>

    function get_category_root_id($cat)
    {
        $this_category = get_category($cat); // 取得当前分类
        while($this_category->category_parent) // 若当前分类有上级分类时，循环
        {
            $this_category = get_category($this_category->category_parent); // 将当前分类设为上级分类（往上爬）
        }
        return $this_category->term_id; // 返回根分类的id号
    }

';
                echo wp_list_categories("child_of=".get_category_root_id(the_category_ID(false)). "&depth=0&hide_empty=0&title_li=&orderby=id&order=ASC");
                echo '

query_posts('showposts=1&cat=3');
while(have_posts()) : the_post();
?>