gabi_louquinha.js

var moment = require("moment");
var a = "2015-09-10";
var b = '2015-10-23';

var start = moment(a);
var end = moment(b);

var c = [];
var iterator=0, index=0;

//var obj = {start: valor, end: valor};

//console.log(start);
//while(start <= end) {
    //if(! c[index]) {c[index]=[]};
    //c[index].push(start);
    //start = start.add(1, 'day');
    //if(iterator >= 6) {
        //iterator = 0;
        //index++;
    //} else {
        //iterator++;
    //}
//}

//console.log(c[4][3].date());

var current = moment(start);
while(start <= end) {
    current.add(7, 'day');

    if (current > end){
        c.push({start: start.format("YYYY-MM-DD"), end: end.format("YYYY-MM-DD")});
    } else {
        c.push({start: start.format("YYYY-MM-DD"), end: current.format("YYYY-MM-DD")});
    }
    start = moment(current).add(1, 'day');
}

console.log(c);