Custom Drupal menu items images

gistfile1.php

<?php
/**
 * Implements theme_menu_item_link()
 * Courtesy of http://chrisshattuck.com/blog/how-use-images-menu-items-drupal-simple-preprocessing-function
 */
function yourtheme_menu_item_link($link) {
  // Allows for images as menu items. Just supply the path to the image as the title
  if (strpos($link['title'], '.png') !== false || strpos($link['title'], '.jpg') !== false || strpos($link['title'], '.gif') !== false) {
    $link['title'] = '<img alt="'. $link['description'] .'" title="'. $link['description'] .'" src="'. url($link['title']) .'" />';
    $link['localized_options']['html'] = TRUE;
  }
  return theme_menu_item_link($link);
}