Someone

for day in 07 08 09 10 11 12 13
do
        for chan in $(grep -v "^#" channel_ids | awk -F: '{ print $2 }')
        do
                echo wget -r -l1 "http://www.prisma.de/fernsehen/programm.html?cid=$chan&day=2007-04-$day"
        done
done