This should work.
Select '1/2/14' as date1,
when strtok(date1, '/', 2) between 1 and 9 then strtok(date1,'/', 3)||'/0'||strtok(date1, '/', 1)||'/'||strtok(date1,'/', 2)
else strtok(date1, '/', 3)||'/'||strtok(date1, '/', 1)||'/'||strtok(date1,'/', 2)
end , 'YY/MM/DD'), 'DD/MM/YYYY') as "DD/MM/YYYY";