Add this code to your child theme’s functions.php file or via a plugin that allows custom functions to be added, such as the Dessky Snippets plugin. Please don’t add custom code directly to your parent theme’s functions.php file as this will be overwritten completely when you update the theme.

/**
 * Show product categories in Woorramework breadcrumbs
 */
// Get breadcrumbs on product pages that read: Home > Shop > Product category > Product Name
add_filter( 'woo_breadcrumbs_trail', 'woo_custom_breadcrumbs_trail_add_product_categories', 20 );
 
function woo_custom_breadcrumbs_trail_add_product_categories ( $trail ) {
  if ( ( get_post_type() == 'product' ) && is_singular() ) {
		global $post;
		
		$taxonomy = 'product_cat';
		
		$terms = get_the_terms( $post->ID, $taxonomy );
		$links = array();
 
		if ( $terms && ! is_wp_error( $terms ) ) {
		$count = 0;
			foreach ( $terms as $c ) {
				$count++;
				if ( $count > 1 ) { continue; }
				$parents = woo_get_term_parents( $c->term_id, $taxonomy, true, ', ', $c->name, array() );
 
				if ( $parents != '' && ! is_wp_error( $parents ) ) {
					$parents_arr = explode( ', ', $parents );
					
					foreach ( $parents_arr as $p ) {
						if ( $p != '' ) { $links[] = $p; }
					}
				}
			}
			
			// Add the trail back on to the end.
			// $links[] = $trail['trail_end'];
			$trail_end = get_the_title($post->ID);
 
			// Add the new links, and the original trail's end, back into the trail.
			array_splice( $trail, 2, count( $trail ) – 1, $links );
			
			$trail['trail_end'] = $trail_end;
		}
	}
 
	return $trail;
}
 
/**
 * Retrieve term parents with separator.
 *
 * @param int $id Term ID.
 * @param string $taxonomy.
 * @param bool $link Optional, default is false. Whether to format with link.
 * @param string $separator Optional, default is '/'. How to separate terms.
 * @param bool $nicename Optional, default is false. Whether to use nice name for display.
 * @param array $visited Optional. Already linked to terms to prevent duplicates.
 * @return string
 */
 
if ( ! function_exists( 'woo_get_term_parents' ) ) {
function woo_get_term_parents( $id, $taxonomy, $link = false, $separator = '/', $nicename = false, $visited = array() ) {
	$chain = '';
	$parent = &get_term( $id, $taxonomy );
	if ( is_wp_error( $parent ) )
		return $parent;
 
	if ( $nicename ) {
		$name = $parent->slug;
	} else {
		$name = $parent->name;
	}
 
	if ( $parent->parent && ( $parent->parent != $parent->term_id ) && !in_array( $parent->parent, $visited ) ) {
		$visited[] = $parent->parent;
		$chain .= woo_get_term_parents( $parent->parent, $taxonomy, $link, $separator, $nicename, $visited );
	}
 
	if ( $link ) {
		$chain .= '<a href="' . get_term_link( $parent, $taxonomy ) . '" title="' . esc_attr( sprintf( __( "View all posts in %s" ), $parent->name ) ) . '">'.$parent->name.'</a>' . $separator;
	} else {
		$chain .= $name.$separator;
	}
	return $chain;
	}
}