Need Help Making Nav Button to Jump to Beginning of Category (xpost from How-To)

My site displays different webcomic titles per day, in the background each title is its own category. I need a way to make a nav arrow that jumps to that category’s first post, but it’s in the single page php, so it has to dynamically figure out which category the page is currently displaying. I’ve got the previous, next buttons working but I need a way to jump to the category’s first strip and latest.
Thanks!

[duplicate: http://wordpress.org/support/topic/need-help-making-nav-button-to-jump-to-beginning-of-category?replies=1 – please focus on one topic per problem – closed]