Problem mit Übersetzung | Gesucht: Drop-Down Menü

PHP-Code:
<div id="header">
<div class="ptop">
<div style="width: 920px; margin: auto auto;" class="no-js">
        
<nav id="topNav">  
                <ul>  
<li><a href="{$mybb->settings['bburl']}/index.php" title="Forum">Forum</a></li>
                    <li><a href="{$mybb->settings['bburl']}/search.php?action=getnew" title="View the latest posts">{$lang->welcome_newposts}</a></li>
                    <li><a href="{$mybb->settings['bburl']}/memberlist.php" title="See a list of our members">{$lang->toplinks_memberlist}</a></li>
                    <li><a href="{$mybb->settings['bburl']}/calendar.php" title="Browse our Calendar">{$lang->toplinks_calendar}</a></li>
                    <li><a href="{$mybb->settings['bburl']}/misc.php?action=help" title="Read various FAQs and get information on different parts of the board">{$lang->toplinks_help}</a></li> 
                <li><a href="#" title="Nav Link 1">Nav Link 2 test</a>
                    <ul>
                        <li><a href="#" title="Sub Nav Link 1">Sub Nav Link 1</a></li>
                        <li><a href="#" title="Sub Nav Link 2">Sub Nav Link 2</a></li>
                        <li><a href="#" title="Sub Nav Link 3">Sub Nav Link 3</a></li>
                        <li><a href="#" title="Sub Nav Link 4">Sub Nav Link 4</a></li>
                        <li class="last"><a href="#" title="Sub Nav Link 5">Sub Nav Link 5</a></li>
                    </ul>        
                </li>   
            </ul>  
        </nav>

</div>
</div><br />
<div class="logtlo">

<div id="panel" style="float: left;">
{$welcomeblock}
</div>
<div class="logo" style="float: right;"><a href="{$mybb->settings['bburl']}/index.php"><img src="{$theme['logo']}" alt="{$mybb->settings['bbname']}" title="{$mybb->settings['bbname']}" /></a></div>
</div>
    </div>
<hr class="hidden" />
            <div id="container">
        <a name="top" id="top"></a>
        <hr class="hidden" />
        <div id="content">
            {$pm_notice}
            {$bannedwarning}
            {$bbclosedwarning}
            {$unreadreports}
            {$pending_joinrequests}
            <navigation>
            <br />