I can't find any of these files except two.
<!-- Start of the headers for !CoffeeCup Menu Builder -->
<link rel='stylesheet' type='text/css' href ='mbsouth/stylesheets/menu_builder.css'/>
<link rel='stylesheet' type='text/css' href ='mbsouth/stylesheets/style.css'/>
<script type="text/javascript" src="mbsouth/js/jquery-1.8.2.min.js"></script>
<script type="text/javascript" src="mbsouth/js/modernizr-2.6.2-respond-1.1.0.min.js"></script>
<script type="text/javascript" src="mbsouth/js/tinynav.js"></script>
<script type="text/javascript" src="mbsouth/js/mb.js"></script>
<!-- End of the headers for !CoffeeCup Menu Builder -->
The menu_builder.css is here.
http://myrtlebeachsouth.com/css/menu_builder.css
The menu builder style.css is here.
http://myrtlebeachsouth.com/css/style.css
You need to look at where your files are actually located on your server.
Set your links up absolute for now.
<link rel='stylesheet' type='text/css' href ='http://myrtlebeachsouth.com/css/menu_builder.css'/>
<link rel='stylesheet' type='text/css' href ='http://myrtlebeachsouth.com/css/style.css'/>
Adjust the others the same way based on their actual location.
Or reexport your menu and leave all the files inside the folder as they were exported.
When you export you have mbsouth_exported/mbsouth/
Take the mbsouth folder and all of it's contents and upload it to the site.
This way you can leave you linking reference alone and use it as provided by the menu builder.
<!-- Start of the headers for !CoffeeCup Menu Builder -->
<link rel='stylesheet' type='text/css' href ='mbsouth/stylesheets/menu_builder.css'/>
<link rel='stylesheet' type='text/css' href ='mbsouth/stylesheets/style.css'/>
<script type="text/javascript" src="mbsouth/js/jquery-1.8.2.min.js"></script>
<script type="text/javascript" src="mbsouth/js/modernizr-2.6.2-respond-1.1.0.min.js"></script>
<script type="text/javascript" src="mbsouth/js/tinynav.js"></script>
<script type="text/javascript" src="mbsouth/js/mb.js"></script>
<!-- End of the headers for !CoffeeCup Menu Builder -->