If you only want to ignore them in the menu, I think you can find that info here: http://mvlcek.bplaced.net/get-simple/mul...navigation or someone else knows the exact info.
For example <?php get_i18n_navigation(return_page_slug(),1,99); ?> , I think would ignore all parent menu items.
For example <?php get_i18n_navigation(return_page_slug(),1,99); ?> , I think would ignore all parent menu items.