echo category in rss feed - wordpress

Question

I am pulling an rss feed into my page templates using the default /feed.php. I can echo out the title, permalink and description just fine, but I can't seem to get the categories to display. Ideally I would like to use the category to insert a background image into a div by class.
This is what I have:
<?php if(function_exists('fetch_feed')) {
include_once(ABSPATH . WPINC . '/feed.php');
$feed = fetch_feed('http://www.*link to the feed*');
$limit = $feed->get_item_quantity(50);
$items = $feed->get_items(0, $limit);
}
if ($limit == 0) echo 'The feed is either empty or unavailable.';
else foreach ($items as $item) : ?>
<div class="feedItem">
<div class="<?php echo $item->get_categories(); ?>"></div>
<ul>
<li class="feedtitle"><a href="<?php echo $item->get_permalink(); ?>"
target="_blank"> <?php echo $item->get_title(); ?></a> </li>
<li class="feeddate"><?php echo $item->get_date('m/d/y'); ?></li>
<li><p><?php echo($item->get_description()); ?></p></li>
</ul>
</div><!--item-->
<?php endforeach; ?>
But the <?php echo $item->get_categories(); ?> only echos out <div class="Array"></div>
How do I get the names of the categories from the rss feed?
Any help is appreciated.

Answer 1

Look at your code.
<div class="<?php echo $item->get_categories(); ?>"></div>
You're putting the result of get_categories in the class attribute of your <div>.
According to the documentation, get_categories returns an Array. Therefore, <div class="Array"></div> is exactly what's expected.
I assume you'd rather see something like <div class="category1 category2 category3"></div>? If so, you'll need to work with the array that get_categories returns.
Edited code, based on http://simplepie.org/api/class-SimplePie_Category.html
<?php
$cat_terms = array();
for ($item->get_categories() as $cat) {
$cat_terms[] = $cat->get_term();
}
?>
<div class="<?php echo implode(" ", $cat_terms); ?>"></div>