// Previous and Next Post navigation in the same category in single Posts only
add_action('genesis_after_entry', 'sk_custom_post_nav');
function sk_custom_post_nav() {

    if ( !is_singular('post') )
        return;
    echo '<div class="prev-next-post-links">';
        previous_post_link('<div class="previous-post-link">&laquo; Previous Post: %link</div>', '<strong>%title</strong>', true);
        next_post_link('<div class="next-post-link">Next Post: %link &raquo;</div>', '<strong>%title</strong>', true);
    echo '</div>';

}