Hello, please tell me. how to clear the title of the material from the container <div>?
the header (<div>My stuff about nature</div>) need to do to make it so (My material about nature)
Sorry, I use online translator...

I think a link would be helpful.
I am not sure I understand the question completely.

the link to that website is on the local server
How to clear the CSS attributes in the header of materials?

Generally a clear: both or a <div class="clr"></div> will clear the header elements.
Depending on the template you are using a lot of thing can be different so it is impossible to tell without a link.
The person who should know is the template's developer.