Ticket #41882: 41882.diff

.php

@@ -523 +523 @@
                 'taxonomy'            => 'category',
                 'title_li'            => __( 'Categories' ),
                 'use_desc_for_title'  => 1,
+                'html_wrapper_element' => ''
         );
 
         $r = wp_parse_args( $args, $defaults );
@@ -634 +635 @@
          * @param array  $args   An array of taxonomy-listing arguments.
          */
         $html = apply_filters( 'wp_list_categories', $output, $args );
+        if( isset($r['html_wrapper_element'])  && $r['html_wrapper_element'] === 'dropdown') {
+                $html = '<select>' . $html . '</select>';
+        }
 
         if ( $r['echo'] ) {
                 echo $html;