Best way to set up AJAX/JQuery process?

Hi

Using GroceryCRUD is best for any tables , assume you have a users table, then few lines of code, you have full CRUD table for users.
Also from the CRUD View, you can further do more stuff as you like with jQuery. I also can join tables and producing more useful things

Take a look at GroceryCrud Library for CodeIgniter

Have a great day