// first one is set by API
                $show_empty_cats = $_REQUEST['force_show_empty'] ||
-                       ($_REQUEST['mode'] != 2 && !$search &&
-                               get_pref('_PREFS_SHOW_EMPTY_CATS'));
+                       ($_REQUEST['mode'] != 2 && !$search);
 
                $items = array();
 
 
                if ($enable_cats) {
                        $show_empty_cats = $_REQUEST['force_show_empty'] ||
-                               ($_REQUEST['mode'] != 2 && !$search &&
-                               get_pref('_PREFS_SHOW_EMPTY_CATS'));
+                               ($_REQUEST['mode'] != 2 && !$search);
 
                        $result = $this->dbh->query("SELECT id, title FROM ttrss_feed_categories
                                WHERE owner_uid = " . $_SESSION["uid"] . " AND parent_cat IS NULL ORDER BY order_id, title");
                return;
        }
 
-       function togglehiddenfeedcats() {
-               set_pref('_PREFS_SHOW_EMPTY_CATS',
-                       (get_pref('_PREFS_SHOW_EMPTY_CATS') ? 'false' : 'true'));
-       }
-
        private function process_category_order(&$data_map, $item_id, $parent_id = false, $nest_level = 0) {
                $debug = isset($_REQUEST["debug"]);
 
                print $error_button;
                print $inactive_button;
 
-               print "<button onclick=\"toggleHiddenFeedCats()\"
-                       dojoType=\"dijit.form.Button\">".__('(Un)hide empty categories')."</button>";
-
                if (defined('_ENABLE_FEED_DEBUGGING')) {
 
                        print "<select id=\"feedActionChooser\" onchange=\"feedActionChange()\">
 
        }
 }
 
-function toggleHiddenFeedCats() {
-       try {
-               notify_progress("Loading, please wait...");
-
-               new Ajax.Request("backend.php", {
-                       parameters: "?op=pref-feeds&method=togglehiddenfeedcats",
-                       onComplete: function(transport) {
-                               updateFeedList();
-                       } });
-
-       } catch (e) {
-               exception_error("toggleHiddenFeedCats");
-       }
-}
-
 function editCat(id, item, event) {
        try {
                var new_name = prompt(__('Rename category to:'), item.name);