Recently I have to add Aria to Flexy menu. I have attached the code.

//flexy.js
(function($){

	jQuery.fn.flexymenu = function(options){
		var settings = {
			 speed: 300,
			 type: "horizontal",
			 align: "left",
			 indicator: false,
			 hideClickOut: true,
			 submenuTrigger: "hover",
			 showDelay: 0,
			 hideDelay: 0,
			 mobileShowDelay: 0,
			 mobileHideDelay: 0,
			 scrollable: false,
			 scrollableMaxHeight: 400
		}
		$.extend( settings, options );
		
		var bigScreen = false;
		var menu = $(this);
		var lastScreenWidth = windowWidth();