WordPress.org

hello to all of you wonderfully smart wordpress people!

I have a question / challenge that I can not wrap my brain around.

What I have:

I am developing a website that has a number of categories. Each category page needs to have different content.

The challenge is, I want the admin of the site to be able to add additional categories in the future and not have to create new template files (as they know nothing about programming)

What I would like to know / learn how to do is this...have the category template determine what ID it is currently in, and to auto fill this ID in the loop to determine content:

here is the code I have so far:

<?php get_header(); ?>

<?php if (have_posts()) : while (have_posts()) : the_post(); ?>

<div id="gallery_content">
<div id="sec_nav_caption">
<?php single_cat_title(); ?>
</div>
<div id="description">
<?php the_excerpt(); ?>
</div>

<div id="left_big_vert">
<?php the_content(); ?>
</div><!-- ends left_big_vert -->

//THIS THUMB GALLERY WILL CHANGE ACCORDING TO CATEGORY

<div id="gallery_thumbs_small">
<ul id="icon_menu">
<?php if (function_exists('put_cat_icons'))
put_cat_icons(wp_list_categories('title_li=0&echo=0&child_of=3'),'icons_only=true');
?>

</div>

<div id="hor_nav">

// THIS MENU WILL CHANGE - by Category
<ul id="menu">