All instructions are on the page http://www.menucool.com/vertical/accordion-menu, and we have no other Users Manual or Documentation.
As there are so many different databases(SQL Server, MySQL, Oracle, ...) and server side languages(PHP, ASP.NET, JSP...), we are unable to provide detailed instructions on how to retrieve data from a database and to build menu HTML markup on the page by a server language. You have to be a developer of that database and that server language.