Add this to archive-portfolio.php, on line 24

Add Portfolio Category Title to Archive

<?php if ( is_post_type_archive('portfolio') OR is_tax() ) { ?>
		
		<div class="block portfolio-archive">
			<h1 class="entry-title">
				<?php 
				if ( is_post_type_archive('portfolio') ) {
					post_type_archive_title();
				} elseif ( get_the_terms($post->ID, 'portfolio_tag') ) {
					printf( __( '%s', 'bean' ), single_tag_title( '', false ) . '' );
				} elseif (get_the_terms($post->ID, 'portfolio_category')) {
					printf( __( '', 'bean' ));  single_cat_title(); 
				} else {
					printf( __( 'Archives', 'bean' ) ); 
				} ?>  
			</h1>

			<?php if ( category_description() ) { ?> 
				<p><?php echo category_description(); ?></p>
			<?php } ?>
		</div><!-- END.block -->
	
	<?php } ?>