First create a functions.php for your child theme and add

// Show Wp-PageNavi when it's active function twentyeleven_child_content_nav( $nav_id ) { global $wp_query; if ( $wp_query->max_num_pages > 1 ) : ?> <?php /* add wp-pagenavi support for posts */ ?> <?php if(function_exists('wp_pagenavi') ) : ?> <?php wp_pagenavi(); ?> <br /> <?php else: ?> <nav id="<?php echo $nav_id; ?>"> <h3 class="assistive-text"><?php _e( 'Post navigation', 'twentyeleven' ); ?></h3> <div class="nav-previous"><?php next_posts_link( __( '<span class="meta-nav">←</span> Older posts', 'twentyeleven' ) ); ?></div> <div class="nav-next"><?php previous_posts_link( __( 'Newer posts <span class="meta-nav">→</span>', 'twentyeleven' ) ); ?></div> </nav><!-- #nav-above --> <?php endif; ?> <?php endif; }

Next copy index.php to your child theme folder and change line 31 to
<?php twentyeleven_child_content_nav( 'nav-below' ); ?>

If wp-pagenavi is installed it will show it, if it isn’t, it’ll show the default next/previous

This would be our output for two post column’s in the twenty eleven theme, if we follow the older solutions, it looks as expected full posts to the left and right columns