I am creating a small business directory plugin using pod.I have 2 kind of pods,business and business_type.The category column of the business pod is a relation pick from the business_type pod.When i am dispalying the business list i am displaying also the filter field using

 $biz->getFilter('business_type');

The issue am having is that the form display a drop down list with all the categories but the promt message is "--Business Type--".Question :How do i change the prompt label for the filter form?