Index: wp-includes/category-template.php
===================================================================
--- wp-includes/category-template.php	(revision 36254)
+++ wp-includes/category-template.php	(working copy)
@@ -348,7 +348,7 @@
  *                                           of the option elements. Accepts any valid term field: 'term_id', 'name',
  *                                           'slug', 'term_group', 'term_taxonomy_id', 'taxonomy', 'description',
  *                                           'parent', 'count'. Default 'term_id'.
- *     @type string       $taxonomy          Name of the category to retrieve. Default 'category'.
+ *     @type string|array $taxonomy          Name of the category or categories to retrieve. Default 'category'.
  *     @type bool         $hide_if_empty     True to skip generating markup if no categories are found.
  *                                           Default false (create select element even if no categories are found).
  * }