Programmatically get menu block & alter classes

Question

I'm invoking a menu block programmatically using: module_invoke('menu_block', 'block_view', 13);

What I want to do is change and add classes to the wrapper & ul tags of the menu block, is this possible? I can't seem to find a class_array to add & have spent a significant amount of time looking through documentation & online but not come up with a solution.

Answer 1

borrowed from here:

add the following code in your template.php file.

<?php
  function THEME_menu_tree__main_menu($variables) {
    return '<ul class="nav navbar-nav navbar-right">' . $variables['tree'] . '</ul>';
  }
?>

this would update the <ul> for main menu, adjust as necessary. You can adjust further up the chain within the page.tpl.php file.