<?php

//Change the default walker for custom menu widgets
add_filter( 'wp_nav_menu_args', 'cpotheme_menu_walker' );
function cpotheme_menu_walker( $args ) {
	//Widgets do not use a theme_location
	if ( '' == $args['theme_location'] ) {
		$args = array_merge( $args, array( 'walker' => new Cpotheme_Menu_Walker() ) );
	}
	return $args;
}