add_filter( 'raindrops_nav_menu_primary_html', 'my_extend_nav_menu' );
function my_extend_nav_menu( $nav_menu ) {
$menus= <<<HTML
<ul id="nav-menu-extend" class="extend-menu" style="float:right;">
<li ><a href="http://example.com/"><img src="http://example.com/wp-content/uploads/2014/07/english.png" title="English" alt="English"></a></li>
<li><a href="http://example.com/frhome/"><img title="Français" src="http://example.com/wp-content/uploads/2014/07/french.png" alt="French"></a></li>
<li><a href="http://example.com/dehome"><img src="http://example.com/wp-content/uploads/2014/07/germany.png" title="German" alt="German"></a></li>
<li><a href="http://example.com/sphome/"><img title="Español" src=" http://example.com/wp-content/uploads/2014/07/spain.png " alt="Spanish"></a></li>
<li><a href="http://example.com/jphome/"><img title="日本の" src=" http://example.com/wp-content/uploads/2014/07/japan.png " alt="Japanese"></a></li>
<li><a href="http://example.com/swhome/"><img title="Svenska" src=" http://example.com/wp-content/uploads/2014/07/swedish.png" alt="Swedish"></a></li>
<li><a href="http://example.com/fihome/"><img title="Suomalainen" src=" http://example.com/wp-content/uploads/2014/07/finland.png" alt="Finnish"></a></li>
<li><a href="http://example.com/klhome/"><img title="tlhIngan" src=" http://example.com/wp-content/uploads/2014/07/klingon3.png" alt="Klingon"></a></li>
</ul>
HTML;
return str_replace( '</div>', $menus . '</div>', $nav_menu );
}
