Method to return a list of all categories that a user has permission for a given action.
public JUser::getAuthorisedCategories ($component, $action)
|$component||string||The component from which to retrieve the categories|
|$action||string||The name of the section within the component from which to retrieve the actions.|
array List of categories that this group can do this action to (empty array if none). Categories must be published.
libraries/joomla/user/user.php (line 325)