var containers = [1,2,3,4].map(n => document.getElementById('draggable_row_container_' + n));

function compare(a, b) {
  return +b.id.split('_')[2] - a.id.split('_')[2];
}

function worst(l) {
  var nl = [];
  var halfl = l.slice(0, (l.length / 2)|0).reverse();
  var rest = l.slice(halfl.length).reverse();
  for (var i = 0; i < halfl.length; i++) {
    nl.push(halfl[i]);
    nl.push(rest[i]);
  }
  return nl;
}

function fixContainer(c) {
  var children = Array.prototype.filter.call(c.childNodes, a => !!a.id);
  children = worst(children.sort(compare));
  c.innerHTML = children.map(child => child.outerHTML).join(' ');
}

containers.forEach(c => fixContainer(c));