Drupal menu nolink function

gistfile1.aw

<?php
/**
 * @file modulename.module
 */

/**
 * Implements hook_menu()
 */
function modulename_menu() {
  // Special item to use as path for menu items that shouldn't link.
  $items['<nolink>'] = array(
    'page callback' => 'drupal_not_found',
    'access callback' => TRUE,
    'type' => MENU_CALLBACK,
  );

  return $items;
}

?>

<?php
/**
 * @file template.php
 */

/**
 * Theme menu-links, with optional nolink items.
 */
function themename_menu_link(&$variables) {
  $element = $variables['element'];
  if (preg_match('{<nolink>}', $element['#href'])) {
  }
  $sub_menu = '';

  if ($element['#below']) {
    $sub_menu = drupal_render($element['#below']);
  }
  if (preg_match('{<nolink>}', $element['#href'])) {
    $title = strip_tags(l($element['#title'], $element['#href'], $element['#localized_options']));
    $css = NULL;
    // Set a class if the link is in the active trail.
    if (!empty($element['#original_link']['in_active_trail'])) {
      $css = 'active-trail';
    }
    $output = '<span>' . $title . '</span>;
    $element['#attributes']['class'][] = 'nolink';
  }
  else {
    $output = l($element['#title'], $element['#href'], $element['#localized_options']);
  }
  return '<li' . drupal_attributes($element['#attributes']) . '>' . $output . $sub_menu . "</li>\n";
}