tertiary

// Register and display Tertiary Navigation Menu
add_action('genesis_before_header', 'genesis_sample_header_menu');
	function genesis_sample_header_menu() {

	register_nav_menu( 'tertiary', 'Tertiary Navigation Menu' );
	
	genesis_nav_menu( array(
		'theme_location' => 'tertiary',
		'menu_class'     => 'menu genesis-nav-menu menu-tertiary',
	) );
}

// Add Theme Support for Genesis Menus
add_theme_support( 'genesis-menus', array( 'primary'   => __( 'Primary Navigation Menu', 'genesis' ), 'secondary' => __( 'Secondary Navigation Menu', 'genesis' ), 'tertiary' => __( 'Tertiary Navigation Menu', 'genesis' ), ) );

// Add .wrap to menu-tertiary
add_theme_support( 'genesis-structural-wraps', array(
	'menu-tertiary',
	'header',
	'nav',
	'subnav',
	'site-inner',
	'footer-widgets',
	'footer'
) );