'product_cat',
'fields' => 'id=>name',
'parent' => 0
);
$categories = get_terms( $args );
if( count( $categories ) > 0 ) : ?>
get_queried_object() );
$args = array(
'taxonomy' => 'product_cat',
'parent' => $category->term_id,
'fields' => 'id=>name'
);
$categories = get_terms( $args );
if( count( $categories ) > 0 ) : ?>