I have a problem with i18n

[eluser]ogib[/eluser]
Hi,
this is my menu in my site

Code:

<ul class="nav nav-justified">
            <li class="active"><a href="">2&lt;?php echo lang('menu.home');?&gt;</a></li>
            <li><a href="&lt;?php= base_url()?&gt;">2&lt;?php echo lang('menu.products');?&gt;</a></li>
            <li><a href="&lt;?php= base_url()?&gt;main/gallery">2&lt;?php echo lang('menu.gallery');?&gt;</a></li>
            <li><a href="&lt;?php= base_url()?&gt;main/about">2&lt;?php echo lang('menu.about_us');?&gt;</a></li>
            <li><a href="&lt;?php= base_url()?&gt;main/contact">2&lt;?php echo lang('menu.contact');?&gt;</a></li>
     </ul>

but every time when change languages and click menu button are set default lang.
Please help