Not sure I understand what you mean. Cut the stems below the leaves and other leaves that sprout won't grow any taller than the cut one?
Here's what mine look like now that I've moved them into a lower light tank and removed the really long stemmed leaf:
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Tina
Puffers:
Auriglobus silus x2
Colomesus asellus x1
Tetraodon travancoricus x1
Tetraodon biocellatus x2
Tetraodon nigroviridis x1
Tetraodon baileyi x2
Tetraodon lineatus x1
Tetraodon palembangensis x1
The greatness of a nation and its moral progress can be judged by the way in which its animals are treated. - Mohandas Gandhi