Using multiple feeds in simplepie with codeigniter

Question

I'm trying to get simplepie to loop through a few rss feeds using codeigniter but I can only get it to display the feed items from the last feed in the array.

I think it is to do with the foreach loop in the _get_feed function but everything I've tried has failed to fix it.

In my controller I have this

class Main extends Controller{

function index()
{
    $this->load->library( 'Simplepie' );

    $feed_urls = array
    (
        'http://feeds.feedburner.com/SputnikmusicNews',
        'http://feeds2.feedburner.com/nmecom/rss/newsxml',
    );

    foreach ($feed_urls as $feed_url)
    {
        $data = $this->_get_feed($feed_url);
    }

    $data['main_content'] = 'main_view';
    $this->load->view('includes/template', $data);
}

function _get_feed($url)
{
    $feed = new SimplePie();
    $feed->set_feed_url($url);
    $feed->init();

    $count = 0;

    foreach($feed->get_items() as $item)
    {
        $data['feed'][$count]['title'] = $item->get_title();
        $data['feed'][$count]['permalink'] = $item->get_permalink();
        $count ++;
    }       
    return $data;
}

}

Then in my view I have this

<?php foreach($feed as $item) : ?>
    <br />
    <a href="<?php echo $item['permalink']; ?>"><?php echo $item['title']; ?  ></a>
<?php endforeach; ?>

I'm aware that it's possible to give simplepie an array of feeds to parse with the set_feed_url function but I don't want to do this as it mixes all the feed items together.

I'd also like to know if placing the _get_feed function in the controller is ok in terms of best practises or would it be better off in a model as it is fetching data?