I've done this in the past, but I can't remember how...
I would like to ask my users for instagram (FIELD_INSTA), facebook (FIELD_F😎 and twitter (FIELD_TW) and then, on the profile, to just show a line of links for them, on a single line.
Is there a way to use field data directly? like http://instagram.com/FIELD_INSTA and be shown on the profiles?
For example: <a href="https://twitter.com/FIELD_TW"><span class="uk-icon-small uk-icon-hover uk-icon-twitter"></span></a>