Page as an external link?

Hello all,

I have created Pages for the main content of my site. My navigation is simply just
<ul>
<?php wp_list_pages('sort_column=menu_order&title_li='); ?>
</ul>


However, I need a couple of my navigation items to simply be an external link. Is there a way I can create a Page which when clicked doesn’t load itself but goes to that external page?

If interested, the site in question is: here

Thanks in advance.