Thanks!
So here is the solution of my problem... if anyone else needs. [b]How to remove the automatic <p> tags[/b]:
1. Open `zp-core/js/editor_config.js.php` file;
2. Edit the existing line `force_br_newlines : true,` (you need it "true", it's "false" by default);
3. Add a new line - `forced_root_block : '',`