View category in the preview of Theme Customizer

Question

I am building a theme which Theme customizer changes colors, sizes, etc. and has also the option to choose a category and style that category specifically.

How can I display that category in the preview (only when the user is changing the corresponding options) instead of the default home/front page displayed by default?

EDIT

I can access the preview window with customize_preview_init, but I can not apply wp_redirect, which I guess could be a way.