How to get lookup header names as field's values

[smart111]

Is there any way to get those header names as field values from lookup files?
Please give me any idea with SPL

[ryanoconnor]

Can you explain the use case a little bit more? This looks like it might be a screenshot from Microsoft Excel. 

Have you looked into the Lookup File Editor App?  https://splunkbase.splunk.com/app/1724/

[smart111]

Thank you for answering @ryanoconnor 

I actually wanted to set a dropdown list of lookup header values on dashboard and make it possible to choose a primary key to  lookup reference field dynamically.

Thank you for your kindness.

[ITWhisperer · Accepted solution]

You could transpose, duplicate the header column and transpose again

| inputlookup lookup.csv
| transpose 0 header_field="NAME" column_name="NAME"
| eval header=NAME
| transpose 0 header_field=header column_name="NAME"

[smart111]

Thank you so much, @ITWhisperer 

This way is exactly I wanted.