Ticket #13019: multiple-category-dropdowns.patch

default-widgets.php

@@ -438 +438 @@
                 $cat_args = array('orderby' => 'name', 'show_count' => $c, 'hierarchical' => $h);
 
                 if ( $d ) {
+                        static $dropdown_count = 0;
+
+                        $cat_id = 'dropdown-'.$args['widget_id'];
+                        $cat_args['id'] = $cat_args['name'] = $cat_id;
                         $cat_args['show_option_none'] = __('Select Category');
                         wp_dropdown_categories(apply_filters('widget_categories_dropdown_args', $cat_args));
 ?>
 
 <script type='text/javascript'>
 /* <![CDATA[ */
-        var dropdown = document.getElementById("cat");
-        function onCatChange() {
+<?php if ( $dropdown_count == 0 ) { ?>
+        function onCatChange( dropdownID ) {
+                var dropdown = document.getElementById(dropdownID);
                 if ( dropdown.options[dropdown.selectedIndex].value > 0 ) {
                         location.href = "<?php echo home_url(); ?>/?cat="+dropdown.options[dropdown.selectedIndex].value;
                 }
         }
-        dropdown.onchange = onCatChange;
+<?php } ?>
+        document.getElementById("<?php echo $cat_id; ?>").onchange = function(){onCatChange(this.id)};
 /* ]]> */
 </script>
 
 <?php
+                $dropdown_count++;
                 } else {
 ?>
                 <ul>