list full articles in category

Hello,

first, sorry for my bad english 🙂

if i add a new site, it`s a static site. but i want to have a category section for each menu link like here http://www.smashingmagazine.com/
how can i do this?

if i change in the header.php the line with

"<?php wp_list_pages('title_li='); ?>"

to

"<?php get_the_category('title_li='); ?>"

it`s only showing the archive and not the articles from the category.
can someone help me? 🙂