HTML Parsing and Screen Scraping with the Simple HTML DOM Library

If you need to parse HTML, regular expressions aren’t the way to go. In this tutorial, you’ll learn how to use an open source, easily learned parser, to read, modify, and spit back out HTML from external sources. Using nettuts as an example, you’ll learn how to get a list of all the articles published on the site and display them.

http://net.tutsplus.com/tutorials/php/html-parsing-and-screen-scraping-with-the-simple-html-dom-library/