EDIT

/**

 * Alter the feature toc items.

 *

 * Modules implementing this hook can add, remove or modify

 * the items in the table of contents of features.

 *

 * the items array is an array suitable for theme_item_list().

 *

 */

function hook_cdm_feature_node_toc_items_alter($items) {

  // NOTE: drupal_get_query_parameters has no internal static cache variable

  $http_request_params = drupal_get_query_parameters();

  $items[] = array(

              // a html link element as item:

              l(

                theme('cdm_feature_name', array('feature_name' => 'My new feature item')),

                $_GET['q'],

                array(

                    'attributes' => array('class' => array('toc')),

                    'fragment' => generalizeString('My new feature item'),

                    'query' => $http_request_params

                )

              )

            );

  return $items;

}