I have thought about this and think it's far more complicated than you think.
Your trying to read rss feeds using "echo $rss->title;" What if it doesn't have a title or if the title is buried.
echo "<li><a href=\"".$e->link['href'] Means that the element link has an attribute. What if it doesn't. What if it's <link>http://www.wikipedia.org/</link>?
I looked up http://myfeedurl.com/feeds
to see what you were reading for starters and that does not exist.
There is no generic form for an rss feed so trying to read every single one submitted with a single method will just lead to failure.