I’ve searched all over and have only found:
<?php wp_nav_menu( array( 'sort_column' => 'menu_order', 'container_class' => 'menu-header' ) ); ?>
I’m not too good with WordPress but I’m guessing this won’t be compatible with my current menu. Code below:
<li class="mm-item" style="float: left; "> <a href="index-2.html" class="mm-item-link">Home |</a>
</li>
Is there anything capable of outputting that modified per page?
Everything that you can change or add to wp_nav_menu generated code is detailed in the Codex: http://codex.wordpress.org/Function_Reference/wp_nav_menu
I’m worried about your code, however, because the link points to index-2.html which is not what it would look like on a WordPress based system. But perhaps you were just referring to the classes; if so, you can add these through extra parameters.
You should be open to perhaps rewrite your CSS. For example give the menu container an ID and then replace mm-item with #container-id li and mm-item-link with #container-id li a