Add Description to Subnav

gistfile1.aw

<?php
/**
 * Add Description to Subnav
 * @author Bill Erickson
 * @link http://www.billerickson.net/customizing-wordpress-menus/
 *
 * @param string $subnav_output
 * @param string $subnav
 * @param array $args
 * @return string
 */
function be_subnav_with_description( $subnav_output, $subnav, $args ) {

	// Add Walker to the subnav arguments
	$walker = new Menu_With_Description;
	$args['walker'] = $walker;

	// Build the subnav
	$subnav = genesis_nav( $args );
	$subnav_output = sprintf( '<div id="subnav">%2$s%1$s%3$s</div>', $subnav, genesis_structural_wrap( 'subnav', 'open', 0 ), genesis_structural_wrap( 'subnav', 'close', 0 ) );

	// Return subnav
	return $subnav_output;
}
add_filter( 'genesis_do_subnav', 'be_subnav_with_description', 10, 3 );