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
You can read a full write-up on the filter—including additional examples—on the Gravity Forms filter documentation page.
Here's an example of using the filter to hide fields that have an empty value: