How to show Sub Categories on Categories page?

Question

I have a product page which is assigned as category.php. Now i want to show Sub Categories as Sub Menu on the Category page. But even after searching alot i couldn't show all sub categories yet. I found one code which is :

 <?php
if (is_category()) {
$this_category = get_category($cat);
}
?>
<?php
if($this_category->category_parent)
$this_category = wp_list_categories('orderby=id
&title_li=&use_desc_for_title=1&child_of='.$this_category->category_parent.
"&echo=0"); else
$this_category = wp_list_categories('orderby=id&depth=1
&title_li=&use_desc_for_title=1&child_of='.$this_category->cat_ID.
"&echo=0");
if ($this_category) { ?> 

<ul>
<?php echo $this_category; ?>

</ul>

<?php } ?>

but what this is doing is it doesnt shows up the sub categories which has 0 posts. Also it shows NO CATEGORIES where categories don't have any sub categories and There is a bullet before every listing, which i dont want at all. So Please help.

Answer 1

You can use get_categories & wp_list_categories with specific parameters (to use directly in you category.php template):

// List sub cats
$params = array(
    'parent'        =>  get_queried_object_id(), //id of current category displayed 
    'orderby'       => 'name',
    'order'         => 'ASC',
    'hide_empty'    =>  false // do not hide sub cats without posts
);
if ( count( get_categories( $params ) ) ) {
    wp_list_categories( $params );
}

Full list of arguments can be found here

You can also customize the output by user your own Walker extending WP's Walker_Category class.