Dynamic sidebar based on category

There are many solutions to your problem, I guess. Two solutions I would recommend are:

1. Register multiple sidebars.

Register more sidebars and then include them conditionally in page templates. So if you need different sidebar for each category (let’s say you have 2 categories), then register 2 more sidebars (sidebar-cat-1, sidebar-cat-2) and then replace generic sidebar with one of these two, based on what category is displayed.

2. There is plugin for that 😉

You could check these plugins:

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