Hey Andrey,

I am really sorry for the delay of this reply,

Unfortunately we do not have the setting to switch this from absolute path to relative path if you using built-in composer editor.

But you have achieve this when you switch to Tiny-mce or JCE editor.

By the way, please remember to assign your domain to your license to obtain for support in the future. You can do so by accessing your license area at http://stackideas.com/dashboard