if i use {springleaf drum} to tap {zhur-taa druid} for mana, will it deal 1 damage to each opponent?
No, as you are not tapping it for mana, technically speaking. You are tapping it as a cost to activate an ability. It just happens that the ability adds mana to your mana pool.
If you were to give another mana ability (say, with an equipment) then it would work, but unfortunately that is not the case here.
RESOLVED
got it. thanks for quick reply. thats what i expected since it wasnt the druid's ability.