function custom_do_header() {

	if ( wp_is_mobile() ) {

		echo '<a href="' . get_bloginfo( 'url' ) . '"><img class="aligncenter" src="http://cl.ly/image/3v3Q2b330y2z/logo.gif" /></a>';

		// wp_nav_menu(
		// 	array(
		// 		'menu' => 'Contributors',
		// 		'container' => 'nav',
		// 		'menu_class' => 'genesis-nav-menu'
		// 	)
		// );

		genesis_nav_menu( array(
			'theme_location' => 'header',
			'menu_class'     => 'menu genesis-nav-menu',
		) );

		do_action( 'genesis_site_description' );

	}

	else {

		$divider_html = '<a href="' . get_bloginfo( 'url' ) . '"><img src="http://cl.ly/image/3v3Q2b330y2z/logo.gif" /></a>';

		wp_nav_menu(
			array(
				// 'menu' => 'Contributors',
				'theme_location' => 'header',
				'divider_html' => $divider_html,
				'container' => 'nav',
				'menu_class' => 'genesis-nav-menu'
			)
		);

		do_action( 'genesis_site_description' );

	}

}