I Found Solution at http://blog.stuartherbert.com/php/2007/01/07/using-simplexml-to-parse-rss-feeds/ Open application/libraries/Rssparser.php. Go to Line Number 107 Add Follwing Statement.
$ns = $xml->getNamespaces(true);
$content = $item->children($ns['content']);
$data['content'] = (string) trim($content->encoded);
And You may use
echo $item['content'];
in your View file.