To delete a category:
1. Navigate to Components-> .Mighty Resources-> Sections in the Joomla global menu. The Sections page appears and displays a list of existing sections.
2. Click the Categories link corresponding to the section whose category you want to delete. The Categories page appears and displays a list of existing categories.
3. Select the check box corresponding to the category you want to delete and click the Delete button  in the toolbar, as shown in the following figure:
The selected category is deleted.
To delete more than one categories, select the check boxes corresponding to the categories, and click the Delete button in the toolbar.