Automatically Updating Nav Links

Question

I created 2 buttons, prev and next for a website. How do i make it update itself and work based on category? For example, category 1 and 2 are about different topics, how do i make sure the next or previous page isn't from category 2 when it's meant to be on category 1. So essentially, it needs to be able to be a permanent fix on the site, but still change based on the post and category it's on. Any advice or ideas?

Answer 1

Cloudy Sunlight it might be easier for someone to understand what you'd like to do if you can post an example. Please read the following to help you with attaching the code:
https://code.sololearn.com/Wek0V1MyIR2r/?ref=app

Answer 2

If you mean classifying the different elements of the page by category 1 and 2, you can make it with classes.
Example:
<div id=“category1”>
<!--Elements in the div-->
</div>
<div id=“category2”>
<!--Elements in the div-->
</div>