Pure PHP Code in Frontend

I have installed “Nice”, in the Shop page and the woocommerce product pages is pure php code, how to fix this??? (And why does it happen?)

'name', 'order' => 'asc', 'hide_empty' => true, ); $product_categories = get_terms( 'product_cat', $cat_args ); if ( ! empty( $product_categories ) ) { echo '

get_id() ) ) { $attachment_ids[0] = get_post_thumbnail_id( $product->get_id() ); $attachment = wp_get_attachment_image_src( $attachment_ids[0], 'full' ); $attachment_alt = get_post_meta( $attachment_ids[0], '_wp_attachment_image_alt', TRUE); $attachment_title = get_the_title( $attachment_ids[0] ); ?>?

?get_gallery_image_ids(); foreach( $product_image_ids as $product_image_id ) { $image = wp_get_attachment_image_src( $product_image_id, 'full' ); $image_alt = get_post_meta( $product_image_id, '_wp_attachment_image_alt', TRUE); $image_title = get_the_title( $product_image_id ); echo '

'; } } // Closing div found in Close Summary Wrap element ?>