convertPhaseOutputToString.py

import clr
clr.AddReference('ProtoGeometry')
from Autodesk.DesignScript.Geometry import *

#our inputs
phases = IN[0]

#to output
results = []

#iterate through the input
for i in phases:
	#here we get the type of the data and output it, if it is a string.
	if i.GetType().ToString() == "System.String":
		results.append(i)
	else:
		#if it wasn't a string, we output the name
		results.append(i.Name)

#Assign your output to the OUT variable.
OUT = results