Only way to do that is use CSS to move the fields to be side by side using a float or something of the sort. Example as follows will move 2 drop-down fields to be side by side (they should be directly placed after one another).
Code:
.cbEditProfile #cbfr_92 {
position: relative;
top: -27px;
left: 270px;
}
.cbEditProfile #cbfr_92 label,
.cbEditProfile #cbfr_91 .cbFieldIcons {
display: none;
}
Please note I am moving the element in respect to how it is placed on my template. You may need to adjust "top" and "left" to fit your template. Also note the above is with DIV layout and the IDs of 2 fields on my install, which would also need to be adjusted. The above is just an example of 1 possibility to do this. Another option is to use CB Auto Actions to include jQuery in the header and move the elements using jQuery (easier and more reliable then CSS).