After some frantic hair-pulling, I finally got this to work in Drupal 6.x. Here I am presenting 2 ways to add images/Html to Drupal node titles (both based on template.php), and you can choose any of them as per your needs. There are pretty other options (including doing this via background-images & css).

  1. Add these 2 methods to your theme’s template.php:
    {syntaxhighlighter brush: php;fontsize: 100; first-line: 1; }function themename_menu_item_link($link) {
    if (empty($link[‘localized_options’])) {
    $link[‘localized_options’] = array();
    }

    if(strpos($link[‘title’], ‘<img’) !== false) {
    // Allow HTML if the menu description is an image tag:
    $link[‘localized_options’][‘html’] = true;
    }

    return l($link[‘title’], $link[‘href’], $link[‘localized_options’]);
    }

    function phptemplate_get_primary_links() {
    return menu_tree(variable_get(‘menu_primary_links_source’, ‘primary-links’));
    }{/syntaxhighlighter}Then in page.tpl.php, write this wherever you want to print your primary menu:

    <?php print phptemplate_get_primary_links(); ?>

    You should off-course change the menu names for your desired menu. You would nead to repeat the _get_menu_name() method for each menu you want to support.

  2. Add this single method to your theme’s template.php:

    {syntaxhighlighter brush: php;fontsize: 100; first-line: 1; }function themename_get_primary_links($links) {
    foreach ($links as &$link) {
    if(strpos($link[‘title’], ‘<img’) !== false) {
    // Allow HTML if the menu description is an image tag:
    $link[‘html’] = true;
    }
    }

    return($links);
    }{/syntaxhighlighter}
    Then in page.tpl.php, write this wherever you want to print your primary menu:

    <?php print theme('links', themename_get_primary_links($primary_links), array('class' => 'links primary-links')) ?>

    You should again change the menu names for your desired menu.

There could be many more variations of these 2 approaches depending upon how you want the menu items to appear, in a list, independently, or whatever.