Create a tree containing two top-level nodes that each contain a child node.

fig = uifigure;
tree = uitree(fig,'Position',[20 20 200 150]);
node1 = uitreenode(tree,'Text','Runners');
node2 = uitreenode(tree,'Text','Cyclists');
runner = uitreenode(node1,'Text','Joe');
cyclist = uitreenode(node2,'Text','Rajeev');

Move Cyclists before Runners.

move(node2,node1,'before');

Move Cyclists after Runners. Since the default value of location is 'after', you can omit that argument.

move(node2,node1);