[phoenix1977]

$newTemplate = vB_Template::create('navbar_breadcrumbs');
    $newTemplate->register('navbits', $navbits);
$breadcrumbs = $newTemplate->render();  
$breadcrumbs = str_replace("'", "'", $breadcrumbs);

// to put it above the Forum Information box
$find = '<div id="forum_info_options" class="forum_info">';

$vbulletin->templatecache['FORUMDISPLAY'] = str_replace($find,$breadcrumbs.$find, $vbulletin->templatecache['FORUMDISPLAY']);

For forumdisplay this method work but there is a little problem with subforum of subforum where doesn't work.
Examples: Home >> Videogames (work)
Examples 2: Home >> Videogames >> Nintendo (doesn't work)
Examples 3: Home >> Videogames >> Nintendo >> Wii (doesn't work)

How to fix it? Any ideas?