Drupal shows "create content" menu item to anonymous users

gistfile1.aw

<?php
/**
* From my blog post at:
*
* http://www.dmuth.org/node/1201/drupal-shows-create-content-menu-item-anonymous-users
*
*/

if (strstr($_SERVER["REQUEST_URI"], "/node/add")) {

   if (empty($user->uid)) {
      drupal_set_message("You must be logged in to do that");
      drupal_goto("user");
   }

}