Wordpress - Category list related to post

In wordpress website, I need to list all category related to the current page in sidebar. Is there any function to do this? or i need to cha开发者_运维问答nge coding as per my need? If i want to change coding, where to change?

Thanks guys.

How are you 'relating' these categories, through category labels or post tags? The Category Posts Widget might be of some use, but this will only display posts made in a specified category and that doesn't sound like what you're going for.