Cacher is the code snippet organizer for pro developers

<?php
//* Do NOT include the opening php tag shown above. Copy the code shown below.

<!-- As of Genesis 2.1, the Primary Navigation Extras options have been removed for new installs. (upgrades of current installs to 2.1 will not lose the Primary Navigation Extras settings). If you are running a new install and want to add a the date or a search form to a navigation menu, use the following code. (see comments for further instruction) -->

add_filter( 'wp_nav_menu_items', 'theme_menu_extras', 10, 2 );
/**
 * Filter menu items, appending either a search form or today's date.
 *
 * @param string   $menu HTML string of list items.
 * @param stdClass $args Menu arguments.
 *
 * @return string Amended HTML string of list items.
 */
function theme_menu_extras( $menu, $args ) {

    //* Change 'primary' to 'secondary' to add extras to the secondary navigation menu
    if ( 'primary' !== $args->theme_location )
        return $menu;

    //* Uncomment this block to add a search form to the navigation menu
    /*
    ob_start();
    get_search_form();
    $search = ob_get_clean();
    $menu  .= '<li class="right search">' . $search . '</li>';
    */

    //* Uncomment this block to add the date to the navigation menu
    /*
    $menu .= '<li class="right date">' . date_i18n( get_option( 'date_format' ) ) . '</li>';
    */

    return $menu;

}

<!-- Note: CSS Styling may be required when adding Navigation Extras and will be dependent on your theme. Any changes you wish to make to Navigation Extra display can be made to your child theme style.css file. We highly recommend using Firebug. -->