<span class="payment-icons">
    <ul>
        <li><a href="#"><img class="image-responsive middle-block" src="{{media url="wysiwyg/paymet/americanexpress.png"}}" alt="americanexpress" /></a></li>
        <li><a href="#"><img class="image-responsive middle-block" src="{{media url="wysiwyg/paymet/discover.png"}}" alt="discover" /></a></li>
        <li><a href="#"><img class="image-responsive middle-block" src="{{media url="wysiwyg/paymet/maestro.png"}}" alt="maestro" /></a></li>
        <li><a href="#"><img class="image-responsive middle-block" src="{{media url="wysiwyg/paymet/master.png"}}" alt="master" /></a></li>
        <li><a href="#"><img class="image-responsive middle-block" src="{{media url="wysiwyg/paymet/visa.png"}}" alt="visa" /></a></li>
    </ul>
</span>