replace-mongo.js

var cursor = db.places.find();
while (cursor.hasNext()) {
  var x = cursor.next();
  x['source']['url'].replace('aaa', 'bbb'); // is this correct?
  db.foo.update({_id : x._id}, x);
}

update-fotos.js

var cursor = db.places.find();
while (cursor.hasNext()) {
  var x = cursor.next();
	for(var i=0; i < x["suites"].length; i++){
		var fotos = Array();
		for(var k=0; k < x["suites"][i]["fotos"].length; k++){
			fotos[k] = {"fotos" : x["suites"][i]["fotos"][k] };
		}
		x["suites"][i]["fotos"] = fotos;
	}
	
	db.places.update({_id : x._id}, x);
}