Remove class=”page_item

I am trying to make a menu that works with Dreamweaver’s SpryMenu.
I’ve got everything working except that the ”

• ” ‘s have a class automatically tacked on to them. What’s getting tacked on to the ”
• ” ‘s are:

  "class="page_item page-item-5"

  I just want the output to look like:

  <li>page 1</li>
  <li>page 2</li>
  etc....

  I am using this function to get the pages outputted.

  wp_list_pages('title_li=&echo=0&depth=1&sort_column=menu_order&child_of='.$menuItem->ID);

  I also don’t really want to edit WordPress functions directly to avoid upgrade issues in the future. If I can add some other code to the page that would be great.