Why cron doesn't work to me?

I'm on centOS 7 and I have a wordpress site. Due to some problems with the wordpress default wp-cron settings, I have choosed to do the cron tasks with my server instead. I have used this command:

wget http://ift.tt/1xXIr2p > /dev/null 2>&1

to run every 10 minutes. This works, every ten minutes it try to wget that page but it doesn't generate any outputs and the wordpress cron tasks are not executed.

Furthermore, if I try to open the page: http://ift.tt/1xXIr2p by myself on my browser, I get a blank page... Is this an error? I don't get any message on apache error log... Thank you