List Hierarchical Custom Taxonomy Terms for a Post in an Unordered List

April 1, 2014 12:38pm

You’ve got a custom taxonomy on your WordPress site, and you want to list the terms that apply to a particular post hierarchically (ie, with child terms nested beneath their parent terms). Something like this:

Parent Term 1
- Child Term 1
- Child Term 2
Parent Term 2
- Child Term A
- Child Term B

function list_hierarchical_terms() {

	global $post;

	$taxonomy = 'YOUR_TAXONOMY'; // change this to your taxonomy

	$terms = wp_get_post_terms( $post->ID, $taxonomy, array( "fields" => "ids" ) );

	if( $terms ) {

		echo '<?ul>';

		$terms = trim( implode( ',', (array) $terms ), ' ,' );

		wp_list_categories( 'title_li=&taxonomy=' . $taxonomy . '&include=' . $terms );

		echo '<?/ul>';

	}

}

Then you can just use this anywhere you’d like in your theme:

<?php list_hierarchical_terms(); ?>

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