<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>