      <section id="sidebar">
<?php
if (is_category('column') || (is_single() && in_category('column'))) : 
?>
        <aside class="rss_link">
          <a href="<?php echo get_category_feed_link(get_category_by_slug('column')->term_id); ?>"><img src="<?php echo get_template_directory_uri(); ?>/images/btn_rss_feed.png" width="250" height="28" alt="RSS" /></a>
        </aside>
<?php
endif;
?>
        <div id="primary" class="widget-area">
          <?php dynamic_sidebar('primary-widget-area'); ?>

        </div><!-- #primary end -->
        <div id="secondary" class="widget-area">
          <?php dynamic_sidebar('secondary-widget-area'); ?>

        </div><!-- #secondary end -->
      </section><!-- #sidebar end -->
