Change the direction flow of CSS columns

The closest thing would be to use flexbox

#blogPosts {
   display: flex;
   align-items: left;
   justify-content: left;
   flex-direction: row;
   flex-wrap: wrap;
   flex-flow: row wrap;
   align-content: flex-end;
}

http://jsfiddle.net/o59gc4hw/2/