Provides rel="nofollow" on specific menu links

template.php

<?php

/**
 * Implements theme_preprocess_menu_link()
 */
function the_aim_theme_preprocess_menu_link(&$variables) {
  $nofollowlinks = array(367);

  $element = &$variables['element'];

  if (in_array($element['#original_link']['mlid'], $nofollowlinks)) {
    $element['#localized_options']['attributes']['rel'] = 'nofollow';
  }

  return theme_menu_link($variables);
}