please these types of drop down menu in your form

http://tympanus.net/Tutorials/CustomDropDownListStyling/

please visit this link and tadd these types of beautiful drop down  in your form.I don,t know how to use html and css code..or combine html and css code.

We can assist you in the dropdown customization. Please let us know the form's url and which dropdown you would like and we will try to make it simillar.

You can check the test form created:

http://form.jotformpro.com/form/40926238382963

Let us know if we can be of more assistance.