split sidebar twenty eleven

        <div id="secondary" class="widget-area" role="complementary">
<div class="left-subside">
    <?php if ( ! dynamic_sidebar( 'sidebar-1' ) ) : ?>

                <aside id="archives" class="widget">
                    <h3 class="widget-title"><?php _e( 'Archives', 'twentyeleven' ); ?></h3>
                    <ul>
                        <?php wp_get_archives( array( 'type' => 'monthly' ) ); ?>
                    </ul>
                </aside>
<?php endif; // end left sub-sidebar widget area ?>
</div><!--/.left-subside-->
<div class="right-subside">
<?php if ( ! dynamic_sidebar( 'sidebar-5' ) ) : ?>

                <aside id="meta" class="widget">
                    <h3 class="widget-title"><?php _e( 'Meta', 'twentyeleven' ); ?></h3>
                    <ul>
                        <?php wp_register(); ?>
                        <li><?php wp_loginout(); ?></li>
                        <?php wp_meta(); ?>
                    </ul>
                </aside>

            <?php endif; // end right sub-sidebar widget area ?>
</div><!--/.right-subside-->

        </div><!-- #secondary .widget-area -->