WordPress - Show taxonomies / categories of custom post type

single-knowledgebase.php

<?php
$customPostTaxonomies = get_object_taxonomies('foo');

if(count($customPostTaxonomies) > 0)
{
    foreach($customPostTaxonomies as $tax)
    {
        $args = array(
            'orderby' => 'name',
            'show_count' => 0,
            'pad_counts' => 0,
            'hierarchical' => 1,
            'taxonomy' => $tax,
            'title_li' => ''
        );

        wp_list_categories( $args );
    }
}
?>