display array field as row

Dear all,

Does anyone know how to display an array data into row?
for exampla, I have data like this

conname contype conkey

kelas_pkey p {1,2}

kelas_tahun f {2}

And I want to to display those data above like below

kelas_pkey p 1
kelas_pkey p 2
kelas_tahun f 2

Do you know any sql syntax that would do?
I cannot find it in documentation
or is it not possible?

Regards
Hendra