<section id="footer">
    <div class="row">
        <div class="four columns">
            <?php dynamic_sidebar('sidebar-footer-col1');?>
        </div>
        <div class="four columns">
            <?php dynamic_sidebar('sidebar-footer-col2');?>
        </div>
        <div class="four columns">
            <?php dynamic_sidebar('sidebar-footer-col3');?>
        </div>
    </div>
</section>