<div class="col-md-3">
   <aside>
      <ul>
         <?php 	/* Widgetized sidebar, if you have the plugin installed. */
            if ( !function_exists('dynamic_sidebar') || !dynamic_sidebar('Sidebar') ) : ?>
         <?php endif; ?>
      </ul>
   </aside>
   <!-- sidebar -->
</div>
<!-- col-md-3-->