<?php
$feed = new ezcFeed( 'rss2' );

$category = $feed->add( 'category' );
$category->set( 'Feed category 1' );
$category->domain = "Category domain 1";

$category = $feed->add( 'category' );
$category->set( 'Feed category 2' );
$category->domain = "Category domain 2";

return $feed;
?>