给WordPress主题BIT增加子分类

下面这段是需要放入WordPress函数文件的

<?php
//获取当前分类ID
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
}
?>

下面是放入主题模板里面的

 <?php
$args=array(
'orderby' => 'name',
'child_of'=> get_category_root_id($cat),
'order' => 'ASC'
);
$categories=get_categories($args);
foreach($categories as $category) {
$two_class_parent_id = get_category($category->term_id)->parent;
$three_class_parent_id = get_category($two_class_parent_id)->parent;
if(!$three_class_parent_id){
echo '<li class="catego"><a href="' . get_category_link( $category->term_id ) . '" title="' .get_option( 'cat-title-'.$term_id ).'' . sprintf( __( "" ), $category->name ) . '" ' . ' class="cat-1">' . $category->name.'</a><div class="hr"></div>';
}else{
echo '<span class="cat-2"><a href="' . get_category_link( $category->term_id ) . '" title="' .get_option( 'cat-title-'.$term_id ).'' . sprintf( __( "" ), $category->name ) . '" ' . '>' . $category->name.'</a></span>';
}
}'</li>'
?>

效果是