It doesn't really work that way.
If you have a file that generates that content, you can use the functions include or require to include the file.
It sounds like you want to kind of rip a part of the content from another webpage. Some websites have special utilities to make it easy for developers to do just that: they are called SOAP services, XML-RPC, or RSS. Those techniques supply content from other websites. However, I don't see any such device at that website.
You would need a php program that pretends it's a browser, and then look for the content in the webpage you are programmatically retrieving, and then just display the content you were looking for. It's kind of a messy and involved process, although it can be done with very slow results by just using fopen() and ereg expressions.
Look at the curl function at www.php.net or at fopen() and ereg() or preg(). Also, you may check out snoopy user agent written in PHP at www.sourceforge.com (if it's not there search for it on google).
You might also ask the website to create a RSS or SOAP service specifically for this purpose.
