Thank you all of you for support and advices.
I finally found solution. It seems like it is not possible to use smarty variables in backend, not for filling another value/parameter like Items for Dropdown.
I think it is because in admin (backend) is page not fully generated like when you open page on frontend. So for me it looks that Smarty for backend is different then for frontend.
I couldn't give values to Items with any code useing smarty. I tried many ways, but no one leeds to right result, every time I saw part of code, name of property or blank field for option (Items) in backend Dropdown.
So I left this way and try to do own UDT with straight PHP code and querry do DB. I'm more coder and graphic guy then programmer so it tooks me longer time, but I have it

In UDT I useing function GET for getting ID of page from URL, it is also in URL when you edit page in admin.
And if I have this ID so I can do querry to DB and get content of block for parent page, where is field with "One,Two,Three".
And this I sent to Items with clasic echo line and for Dropdown I use delimiter="," and it works in the way I need, finally
So again, thank you all for advices and help.
Now I have to solve another issue, why URL in search not returning pretty url for news - just only for news (
http://forum.cmsmadesimple.org/viewtopi ... 28&t=69577)