The configure settings allow one to specify a type of link for each field.  There are

• predefined link types
• link types for urls added by third party plugins. an addon is needed for those.
• You can also define your own rule for a link type via filter or pluggable function. See example site specific plugin.

Predefined link types

Hardcoded links

This is an old example of a site specific add-on created specifically for a certain website.

Teachers Website is now a clickable link

This site specific plugin adds a formatting function for a custom field created by a third party plugin.  In this case the field is called ‘teachers-website’.  

The formatting function therefore must be called:

ausers_format_teachers_website($v, $u)

This example includes target=”_blank” as that was requested.  However please read what various institutions advise about opening new windows on links: http://webdesign.anmari.com/2820/dont-force-open-new-windows/

Instructions on how to create your own formatting function are here: https://wpusersplugin.com/2645/format-any-field-any-way-you-wish/

amr_format_extra_fields (zip file)