OK, one thing to clarify. The php file you attached, is that the actual file you are using to display the XML information?
If so - what it looks like you have done is just paste the XML information "hard-coded" into the php page.
What you would need to do is reference the XML output on the 3rd party site, Parse that data for all relevant tags you need pulled over, assign those tags variable names, and THEN tell it how to display.
Not the easiest thing if you are new to XML, and if you have not done something like this before, it could take you quite some time to grab and display the data the way you want.
I wish I could give you an easy answer, but to set this up to dynamically grab the XML feed information and display it on your site...that will take a bit to get coded properly.
