cptr_save

function cptr_save() {
    global $post_ID;

    if (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE ) return;
    if (!isset($_POST['myplugin_noncename'])) return;
    if (!wp_verify_nonce( $_POST['myplugin_noncename'], plugin_basename(__FILE__))) return;
    if (!current_user_can( 'edit_post', $post_ID ) ) return;

    $id = $_POST['post_ID'];
    $related = isset($_POST['reladded']) ? $_POST['reladded'] : array();
    update_post_meta($id, CI_CPTR_POST_RELATED, $related);

    $update_later = get_option('ci_cptr_temp_update_later');
    if($update_later===false) $update_later = array();
    $update_later[$post_ID] = $related;
    update_option('ci_cptr_temp_update_later', $update_later);

}

add_action('init', 'ci_cptr_update_later');


function ci_cptr_update_later()
{
  if(!is_admin()) return;
  $update_later = get_option('ci_cptr_temp_update_later');
  if($update_later===false) $update_later = array();

  foreach($update_later as $key=>$value)
  {
        // You can use $key as the ID of the post that the $rel_id's were associated from.
        foreach ($value as $rel_id) {
            $my_post = array( 'id' => $rel_id, 'post_status' => 'publish');
            wp_update_post( $my_post );
        }

  }
}