Hi @tuanphan
I have a similar issue which the instructions above don't resolve. I have a blog where I want to display author, tags and categories (not date) and a podcast where I just want to display categories and tags (not author or date).
I have tried both injecting the code into the main header and specifying which categories to change display on as well as the code above in the Page Header Code Injection.
Can you please help? 🙂