Change cache time

Solution.

function fnc_Menu_Cache()
{
	class Menu_Cache_Extender extends Menu_Cache
	{
		function __construct()
		{
			$this->cache_time = DAY_IN_SECONDS;

			add_filter( 'wp_nav_menu',                                        array( $this, 'set_cached_menu' ), 10, 2 );
			add_filter( 'pre_wp_nav_menu',                                    array( $this, 'get_cached_menu' ), 10, 2 );
			add_filter( 'plugin_action_links_' . plugin_basename( __FILE__ ), array( $this, 'purge_admin_link' ) );
			add_action( 'wp_update_nav_menu',                                 array( $this, 'refresh_cache' ) );
			add_action( 'admin_init',                                         array( $this, 'purge_cache' ) );
			add_action( 'plugins_loaded',                                     array( $this, 'localization' ) );

		}
	}
	new Menu_Cache_Extender();
}
add_action( 'init', 'fnc_Menu_Cache');