Show Post Category (as well as Widget Title, Post Title and Thumbnail)

Actually, I’m not sure if this the best way but I seem to have made it work (woot!) just by creating:

a new output conditional:

<?php if ( $instance['show_cat'] ) : ?>
	<p class="post-cat">
		<?php the_category(); ?>
	</p>
<?php endif; ?>

a new instance:
$instance['show_cat'] = $new_instance['show_cat'];

and a new widget checkbox:

<p>
	<input class="checkbox" id="<?php echo $this->get_field_id( 'show_cat' ); ?>" name="<?php echo $this->get_field_name( 'show_cat' ); ?>" type="checkbox" <?php checked( (bool) $instance["show_cat"], true ); ?> />
	<label for="<?php echo $this->get_field_id( 'show_cat' ); ?>"><?php _e( 'Show category' ); ?></label>
</p>

I would still appreciate any improvement suggestions you might have.

Otherwise, thank you so much for creating something that 1. Works, and 2. I was able to modify easily with little know-how!

Glad you got it sorted! Looks like you’ve gone about it the right way.

I may add this to a future release when I get the time, or if you want, feel free to submit a pull request in github.

https://github.com/bostondv/ultimate-posts-widget

The new version 1.6 now includes option to show categories and or tags.