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.

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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.