Add new orderby parameter to get_terms in WordPress to allow for natural or alphanumeric sort

sort_terms_naturally.php

<?php
add_filter('get_terms', 'sort_terms_naturally', 20, 3);

function sort_terms_naturally ( $terms, $taxonomies, $args ) {
	if ( isset($args['orderby']) && $args['orderby'] == 'natural' ) {
		$sort_terms = array();
 
		foreach($terms as $term) {
			$sort_terms[$term->name] = $term;
		}
 
		uksort( $sort_terms, 'strnatcmp');
			
		if ( strtolower($args['order']) == "desc") $sort_terms = array_reverse($sort_terms);
	
		return $sort_terms;
	}
}