This is credit Michael Boyink
Put this on your index page or any page where you have a category/weblog archive.
{exp:weblog:category_heading weblog="{my_weblog}"}
<h2>Category Archive: {category_name}</h2>
<p><a href="[b]insert your feed URL here -- put a trailing slash before the C -- very important![/b]C{category_id}/"> Subscribe to the {category_name} posts in <abbr title="Really Simple Syndication">RSS</abbr></a></p>
{/exp:weblog:category_heading}
Credit: Boyink—Category RSS feeds
Category:RSS Category:Categories Category:Templates