Hide groups in dashboard

hello
how i can Hide group via ui_control

Well, there is an option like this:

That allows you to shrink the group.

Yes you can it actually tells you how to do that right in the info panel of the ui control node:

thanks and what about tab how i can show and hide them

read the paragraph before the one about groups.

thanks for your response ,i have other question
when i hide a tab or group this is change only in the current instance
i want to update the other instances how i can resolve this issue

not sure I understand... what other instances ? It will update those connected at the time - as they are the only ones listening for updates. You can use the ui_control node to catch any new arrivals and tell them also.