- Acme Themes

Hello henrique,
You can hide the blog post of specific category using Category IDs and if you need to hide more than one category post, you can separate with comma. But if you are using widget, there is not such options to hide the specific category from all post, You can select the specific category on the respected widget.
Please follow theme docs for more help. http://www.doc.acmethemes.com/supermagpro