Cacher is the code snippet organizer for pro developers

http://stackoverflow.com/questions/5728039/setting-10-products-per-page-in-magento

1) this file:
/app/design/frontend/cendo/ma_cendo1/layout/catalog.xml

search for:  catalog/product_list_toolbar

add/modify the following lines:

<action method="setDefaultListPerPage"><limit>36</limit></action>
<action method="setDefaultGridPerPage"><limit>36</limit></action>