How to do it in telegram bot?

Question

PHP

Hello. I have a DB, in it we will assume 2 tables - categories and the list of positions. Naturally, the positions have a field that indicates the category.
In a telegram bot, I can easily display a menu by category through case.
But how to further process the selected menu item, each category is a template. Those. You will have to change only the condition in the database query for the selected item.
those. we have something like this:
List of categories -> category selection -> send a new menu with a list of positions for this category -> select a position -> send a text with a description (again, the template, we only change the fields from the database)