Theme menu output to include title class

theme-snippets.php

<?php
  // theme menu output to include title class
  function theme_menu_item($link, $has_children, $menu = '', $in_active_trail = FALSE, $extra_class = NULL) {
    $class = ($menu ? 'expanded' : ($has_children ? 'collapsed' : 'leaf'));
    if (!empty($extra_class)) {
        $class .= ' '. $extra_class;
    }
    if ($in_active_trail) {
        $class .= ' active-trail';
    }
    // add title for better cssing
    $class .= ' leaf-title-'.str_replace(' ', '-', strtolower(strip_tags($link)));
    return '<li class="'. $class .'">'. $link . $menu ."</li>\n";
  }
?>