function links()
{
   global $user, $authid, $settings;
   $body = '
<div class="navbar">
  <ul>';
   $headerlinkquery = call('sql_query', "SELECT * FROM menu ORDER BY item_order ASC", 'cache');
   foreach ($headerlinkquery as $headerlinkrow) {
       if (call('visiblecheck', $user['membergroup_id'], $headerlinkrow['rank'])) {
        if (empty($headerlinkrow['window']) || $headerlinkrow['window'] != 'popup') {
         $body .= '
   <li><a href="' . $headerlinkrow['link'] . ($headerlinkrow['authid'] == '1' ? '&amp;' . $authid : '') . '"' . ($headerlinkrow['window'] == 'new' ? ' target="_blank"' : '') . '>' . $headerlinkrow['name'] . '</a></li>';
        } elseif ($headerlinkrow['window'] == 'popup') {
         $body .= '<li><a href="javascript:;" onclick="window.open('' . $headerlinkrow['link'] . ($headerlinkrow['authid'] == '1' ? '&amp;' . $authid : '') . '','','width=' . $headerlinkrow['width'] . ',height=' . $headerlinkrow['height'] . '')">' . $headerlinkrow['name'] . '</a></li>
     ';
        }
       }
   }
   $body .= '
       </ul>
     </div>';
   return $body;
}

INSERT INTO `menu` (`id`, `name`, `link`, `item_order`, `rank`, `authid`, `window`, `height`, `width`) VALUES
(1, 'Home', 'http://www.site.org/index.php', '1', '1,2,3,4', 0, 'same', 0, 0),
(2, 'Forum', 'http://www.site.org/forum', '2', '1,2,3,4', 1, 'same', 0, 0),
(3, 'Messages', 'http://www.site.org/index.php?act=pm', '3', '2,3,4', 1, 'same', 0, 0),
(4, 'Logout', 'http://www.site.org/index.php?act=logout', '4', '2,3,4', 1, 'same', 0, 0),
(5, 'Login', 'http://www.site.org/index.php?act=login', '5', '1', 0, 'same', 0, 0),
(6, 'Profile', 'http://www.site.org/index.php?act=editprofile', '6', '2,3,4', 1, 'same', 0, 0),
(7, 'Admin', 'http://www.site.org/index.php?act=admin', '7', '4', 1, 'same', 0, 0);