Use
Use

$grid->setAlwaysShowOrderArrows(false);

To not show the arrows. Only one will be showed when the field is sorted....
omusico/zfdatagrid,omusico/zfdatagrid,ashishittechnosoft/zfdatagrid,omusico/zfdatagrid,ashishittechnosoft/zfdatagrid,ashishittechnosoft/zfdatagrid,ashishittechnosoft/zfdatagrid,omusico/zfdatagrid