我如何自动将产品添加到类别页面

So I started working on a little site for a client. Originally the requirements were to have about 14 product pages and manual entry of products through html, no cms, just ma and pa stuff.. However over the course of the work, the scope changed to include hundreds of products and now they want a product manager. Im still in school learning PHP so im not the best in the world at it and I wrote the category pages in HTML (http://ra-yon.com/beta/Test_sites/HFE/engagement.php). I made a little product creation page with php to basically insert a couple variables into a template of a preexisting product page. Would there be anyway to add a functionality in php (maybe an append) so it would be added to the end of a category page?

Thanks for the help - a confused student.