http://codex.wordpress.org/Template_Tags/wp_list_pages
check the ‘include’ and ‘exclude’ parameters.
basically, build one line with a list of page ids included, and then the other line with the same ids excluded.
<ul class="navbar1">
<?php wp_list_pages('include=5,9,23&title_li='); ?>
</ul>
<ul class="navbar2">
<?php wp_list_pages('exclude=5,9,23&title_li='); ?>
</ul>
or check your existing nav bar code, and expand it according to the idea above.
Is there a way to achieve this end without hard coding ID #s? I’d like to be able to select which nav bar a page goes into at the page level or some other means that does not require hard coding it into the theme.