Modifying the output of the Edit Entry form

If you want to modify how the HTML of the fields render in the Edit Entry form, there's a filter you should use: gform_field_content. The key is to use it inside GravityView; add the filter inside the gravityview/edit-entry/render/before action and remove it inside the gravityview/edit-entry/render/after action.

About the gform_field_content filter

You can read a full write-up on the filter—including additional examples—on the Gravity Forms filter documentation page.

Sample code

Here's an example of using the filter to hide fields that have an empty value: