Allschwil, at the terminal of the tram 8, appr. 5 minutes walk up from the last station:
http://www.burget-sportpferde.ch/reitangebote.html
Bättwil, tram 10:
http://www.rsz-baettwil.ch/main.php
I like the Binningen stall very much. Dani is great, I would like to go back again.