General :: How To Remove ON / OFF Text In Settings

I am trying to remove the ON/OFF Text in Settings &Co.

Look this:

My goal is to create a Theme Chooser Theme so how i can do this? I already added this in my Theme.apk

values.xml:
<string name="android:capital_on"> </string>
<string name="android:capital_off"> </string>
styles.xml
<style name="Widget.Holo.Button.Toggle" parent="@android:style/Widget.Holo.Button">
<item name="android:textOn"> </item>
<item name="android:textOff"> </item>
</style>