How to change exposed numeric filters to dropdown list

Hi,

I started to develop car classifieds site:
auto2go.lt

Site uses exposed filters.
For example filter numeric field years and price (between operator),

As I understand between operator is allowed only for numeric filters (not allowed for numeric list filters)
User needs to enter from and till values manually.
However I want these values to be a drop-down list similar to this site:
automobilis.lt

Any ideas how to do that ?

I look to some similar discussions such as https://www.drupal.org/node/1549250#comment-5932296
However here is dealing with text field and my field is numeric.

Probably most effective way would be using views hooks but I am not good in hooks (just very introductory knowledge).
I can make such drop-down lists with html or Javascript but which files to edit and how to pass these values to Drupal ?

Thanks in advance,
Edward