declare @name VARCHAR(50)
declare @sql VARCHAR(1000)

declare db_cursor cursor for
SELECT name from master..sysdatabases where name not in ('master','model','msdb','tempdb')

open db_cursor
fetch NEXT from db_cursor into @name

while @@fetch_status = 0

begin
 set @SQL = 'ALTER DATABASE [' + @name + '] SET RECOVERY SIMPLE'
 exec (@SQL)

 fetch next from db_cursor into  @name
end

close db_cursor
deallocate db_cursor