I'd like to use a script that only goes to the next post/previous post in a particular category. This is the common code for filtering through posts:

PHP Code:
                    <div id="post-next" class="one-half"><?php next_post_link('&larr; %link'); ?></div>
                    <div id="post-prev" class="one-half remove-margin"><?php previous_post_link('%link &rarr;'); ?></div>
How do I edit this to navigate it through say Category ID 3?!

THANKS IN ADVANCE!

--Scott G.