save customer category in wo

app/Http/Controllers/CustomerService/WorkOrderController.php

     		$wo->created_by = $user->_id;
     		$wo->save();
 
-    		$form = Form::where('_id',$wo->_id)->first();
+			$form = Form::where('_id',$wo->_id)->first();
+			$form->customer_category = $request->cust_category;
+			$form->save();
     		$contractor = Company::where('_id',$wo->contractor_id)->first();
 
     		$status = ''; $st_id = '';