for Karabiner

private.xml

<?xml version="1.0"?>
<root>
  <item>
    <name>Remap cursor keys</name>
    <identifier>private.remap.cursor_keys</identifier>
    <autogen>__KeyToKey__ KeyCode::HOME, KeyCode::CURSOR_LEFT</autogen>
    <autogen>__KeyToKey__ KeyCode::CURSOR_LEFT, KeyCode::CURSOR_DOWN</autogen>
    <autogen>__KeyToKey__ KeyCode::CURSOR_DOWN, KeyCode::CURSOR_UP</autogen>
    <autogen>__KeyToKey__ KeyCode::CURSOR_UP, KeyCode::HOME</autogen>
  </item>
</root>