GI 3.2 to 3.7 Development

How do I do something like this in GI 3.5.1?

Here is the XML that needs to be mapped to a Matrix:

<a>
<a1>
<a11>abc1</a11>
<b11>def1</b11>
<c11>
<c111>xyz1</c111>
<c111>uvw1</c111>
</c11>
</a1>
<a1>
<a11>abc2</a11>
<b11>def2</b11>
<c11>
<c111>xyz2</c111>
<c111>uvw2</c111>
</c11>
</a1>
<a1>
<a11>abc3</a11>
<b11>def3</b11>
<c11>
<c111>xyz3</c111>
<c111>uvw3</c111>
</c11>
</a1>
</a>

The Matrix needs to look like this:

Thanks