[Yonatan]

Try using $_GET to detect the section.

you can using this example:

PHP Code:

$tabselected = '';
$tablinks = '';

if (($_GET['r'] == 10) && (THIS_SCRIPT == 'vbcms'))  
{
    $vbulletin->options['selectednavtab']='content.php?r=10';
    $tabselected = ' class="selected"';
    $tablinks = '';

}

$template_hook['navtab_end'] .= '<li'.$tabselected.'><a class="navtab" href="content.php?r=10">Tab Name</a>'.$tablinks.'</li>' ;