Dropdown extra options

How to add additional parameters to a value?
At least just an ID, so as not to navigate only through the name of the position.
Approximately as it is in the html:

<option value='100'>Next number</option>

As an option, I tried to add a text object to the Item, and it goes to new lines, but how to set it a value from the code when generating the dropdown?

(sorry for my English)159835-screenshot-4.jpg

I solved this problem by creating two List, I load one into the dropdown, and from the second I take values when I select from the dropdown.

In the second, there can be both IDs and any other objects.

I think this is a normal solution.
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