If your category is 2013 create a file named category-2013.php in your theme folder and add the following:
<div id="post-<?php the_ID(); ?>" <?php post_class( 'clearfix post' ); ?>><div class="entry clearfix">
<?php /* Post title */ ?>
<h2 class="post-title entry-title">
<a href="<?php the_permalink() ?>" rel="bookmark" title="<?php printf( esc_attr__( 'Permalink to %s', 'graphene' ), the_title_attribute( 'echo=0' ) ); ?>"><?php if ( get_the_title() == '' ) { _e( '(No title)', 'graphene' ); } else { the_title(); } ?></a>
<?php do_action( 'graphene_post_title' ); ?></h2>
<?php /* Post meta */ ?>
<?php if ( $post_type->name != 'page' || is_user_logged_in() ) : ?>
<div class="post-meta clearfix">
<?php /* Edit post link, if user is logged in */ ?>
<?php if ( is_user_logged_in() ) : ?>
<p class="edit-post">
<?php edit_post_link( sprintf( __( 'Edit %s', 'graphene' ), $post_type->labels->singular_name ), ' (', ')' ); ?></p>
<?php endif; ?>
<?php do_action( 'graphene_post_meta' ); ?></div>
<?php endif; ?></div></div>