<div class="dropdown">
    <span class="dropdown-toggle" data-toggle="dropdown"><strong>USD</strong>
        <i class="fa fa-angle-down"></i>
    </span>
    <ul class="dropdown-menu">
        <li><a href="#">EUR <span class="right">&euro;</span></a> </li>
        <li><a href="#">USD <span class="right">$</span></a> </li>
    </ul>
</div>