A much better way is to do this server side. Whether you use PHP or some other language, the concept is exactly the same.
Generally you would use a CMS (Content Management System), which uses a database to store the website content and other stuff. It would be fairly straight forward to create your own CMS, in PHP, for editing your lists. But since you're not keen on learning MySQL, plan B could be to have a 2D array at the top of your web page to store all your lists' content and then use PHP to create the html for the lists by looping through the 2D array. So effectively, the 2D array basically replaces the database.
So whenever you want to change the content of the lists, you simply just edit the 2D array's content at the top of the web page.