drupal_routes/sites/all/themes/bootstrap/templates/menu/menu-link.func.php

<?php
/**
 * @file
 * Stub file for bootstrap_menu_link() and suggestion(s).
 */

/**
 * Returns HTML for a menu link and submenu.
 *
 * @param array $variables
 *   An associative array containing:
 *   - element: Structured array data for a menu link.
 *
 * @return string
 *   The constructed HTML.
 *
 * @see theme_menu_link()
 *
 * @ingroup theme_functions
 */
function bootstrap_menu_link(array $variables) {
  $element = $variables['element'];
  $sub_menu = '';

  if ($element['#below']) {
    // Prevent dropdown functions from being added to management menu so it
    // does not affect the navbar module.
    if (($element['#original_link']['menu_name'] == 'management') && (module_exists('navbar'))) {
      $sub_menu = drupal_render($element['#below']);
    }
    elseif ((!empty($element['#original_link']['depth'])) && ($element['#original_link']['depth'] == 1)) {
      // Add our own wrapper.
      unset($element['#below']['#theme_wrappers']);
      $sub_menu = '<ul class="dropdown-menu">' . drupal_render($element['#below']) . '</ul>';
      // Generate as standard dropdown.
      $element['#title'] .= ' <span class="caret"></span>';
      $element['#attributes']['class'][] = 'dropdown';
      $element['#localized_options']['html'] = TRUE;

      // Set dropdown trigger element to # to prevent inadvertant page loading
      // when a submenu link is clicked.
      $element['#localized_options']['attributes']['data-target'] = '#';
      $element['#localized_options']['attributes']['class'][] = 'dropdown-toggle';
      $element['#localized_options']['attributes']['data-toggle'] = 'dropdown';
    }
  }
  // On primary navigation menu, class 'active' is not set on active menu item.
  // @see https://drupal.org/node/1896674
  if (($element['#href'] == $_GET['q'] || ($element['#href'] == '<front>' && drupal_is_front_page())) && (empty($element['#localized_options']['language']))) {
    $element['#attributes']['class'][] = 'active';
  }
  $output = l($element['#title'], $element['#href'], $element['#localized_options']);
  return '<li' . drupal_attributes($element['#attributes']) . '>' . $output . $sub_menu . "</li>\n";
}

/**
 * Overrides theme_menu_link() for book module.
 */
function bootstrap_menu_link__book_toc(array $variables) {
  $element = $variables['element'];
  $sub_menu = drupal_render($element['#below']);
  $element['#attributes']['role'] = 'presentation';
  $link = TRUE;
  if ($element['#title'] && $element['#href'] === FALSE) {
    $element['#attributes']['class'][] = 'dropdown-header';
    $link = FALSE;
  }
  elseif ($element['#title'] === FALSE && $element['#href'] === FALSE) {
    $element['#attributes']['class'][] = 'divider';
    $link = FALSE;
  }
  elseif (($element['#href'] == $_GET['q'] || ($element['#href'] == '<front>' && drupal_is_front_page())) && (empty($element['#localized_options']['language']))) {
    $element['#attributes']['class'][] = 'active';
  }
  if ($link) {
    $element['#title'] = l($element['#title'], $element['#href'], $element['#localized_options']);
  }
  return '<li' . drupal_attributes($element['#attributes']) . '>' . $element['#title'] . $sub_menu . "</li>\n";
}