create similar this field in cb registration form (favorite field)

hi
i want create a field in my CB registraiton form that can show a list of some expert. and then user can select some of that and not need to press Crtl for select multi expert from that list. some thing such as this demo field, please look:
selectize.github.io/selectize.js/
this drop down is very rest to select or remove expert from his field.


how to implement this type of field in cb?

Looks like just a tags usage, which is a core fieldtype available in CB. Simply create a new field and set Type to Tag. It allows users to select from the list of available options or add their own options.