Ticket #20156: post-template.multiselect_dropdown_categories.patch

category-template.php

@@ -307 +307 @@
                 'name' => 'cat', 'id' => '',
                 'class' => 'postform', 'depth' => 0,
                 'tab_index' => 0, 'taxonomy' => 'category',
-                'hide_if_empty' => false
+                'hide_if_empty' => false,
+                'multiselect' => false
         );
 
         $defaults['selected'] = ( is_category() ) ? get_query_var( 'cat' ) : 0;
@@ -336 +337 @@
         $id = $id ? esc_attr( $id ) : $name;
 
         if ( ! $r['hide_if_empty'] || ! empty($categories) )
-                $output = "<select name='$name' id='$id' class='$class' $tab_index_attribute>\n";
+                $output = "<select name='$name' id='$id'".(($multiselect) ? "multiple='multiple'" : "")." class='$class' $tab_index_attribute>\n";
         else
                 $output = '';