Created different template for Webdesign Portfolio page at http://blog.hostonnet.com/category/webdesign-portfolio.
By creating templates for categories you can add specific features on category pages. For example, you can allow users to subscribe to categories, add category images, show category description and choose a different layout for each category.
WordPress has a template hierarchy that is used to find which template file to use.Now lets assume that you have a category called ‘webbesign’ with the category-slug ‘webbesign’ and you want to display this category differently than others. To do that, you need to create a template for that particular category.
Download category.php from wp-content/themes/YOURTHEME, then copy all the contents of category.php and paste them in a text editor like Notepad. Save this file as category-webbesign.php and upload the file to your theme directory.
Now any changes you make to this template will only appear in this particular category’s archive page.
More details at http://codex.wordpress.org/Category_Templates
We can do the same by using the Custom Category Template plugin