// hack by Gray <www.justphp.net> - category mapping by article's category and its parent category
$db = $this->db;
$query = $db->getQuery( true );
$query->select( $db->quoteName( 'parent_id' ) );
$query->from( '#__categories' );
$query->where( "id = {$db->quote( $catid )}" );
$this->db->setQuery( $query );
try {
	$db->execute();
} catch ( Exception $e ) {
	$this->debug ( "onPrepareContent.Parent IDs: Error executing query - " . $e );
}
$parent_catid = $db->loadResult(); // parend ID of the article's category
$this->debug( "onPrepareContent.Parent category ID is: " . $parent_catid );

if ( !empty( $categoryMap ) ) { // let's check the mapping

	if ( isset( $categoryMap[ $catid ] ) ) { // 1st check - by article's category
		$forumcatid = intval( $categoryMap[ $catid ] );
		$msg = "onPrepareContent.Allow: Category {$catid} is in the category map using Kunena category {$forumcatid}";
	} else if ( !empty( $parent_catid ) && isset( $categoryMap[ $parent_catid ] ) ) { // 2nd check - by parent category
		$forumcatid = intval( $categoryMap[ $parent_catid ] );
		$msg = "onPrepareContent.Allow: Paratent category {$parent_catid} of the article category {$catid} is in the category map using Kunena category {$forumcatid}";
	}
		
	if ( !$forumcatid ) {
		$this->debug ( "onPrepareContent.Deny: Category {$catid} was disabled in the category map." );
		return false;
	}
	$this->debug( $msg );
	return $forumcatid;

}
// end hack