MySQL: Sort GROUP_CONCAT values

In short: Is there any way to sort the values in a GROUP_CONCAT statement? Query: GROUP_CONCAT((SELECT GROUP_CONCAT(parent.name SEPARATOR " » ") FROM test_competence AS node, test_competence AS parent WHERE node.lft BETWEEN parent.lft AND parent.rgt AND node.id = l.competence AND parent.id != 1 ORDER BY parent.lft) SEPARATOR "<br />\n") AS competences I get this row: > Crafts » Joinery > > Administration » Organization I want it like this: > Administration » Organization > > Crafts » Joinery