Arena name

[kruma]

Hello!
need help to hide arena1-3 name

[Phanx]

Assuming those are the default UI's arena enemy frames:

local function ClearText(obj, text)
     if text ~= "" then -- check first to avoid infinite loops
          obj:SetText("")
     end
end

for i = 1, 5 do
     hooksecurefunc(_G["ArenaEnemyFrame"..i].name, "SetText", ClearText)
end

If you need help turning the above code into an addon, copy and paste it into this page:
http://addon.bool.no/