a.js

exports.commands = {
    mb: 'musicbox',
    musicbox: function (target, room, user) {
        if (!this.canBroadcast()) return;
        var parts = target.split(',');
        if (!target) return this.sendReply("/musicbox link, link, link - parses it to be in a music box");
        var str = '';
        for (var x = 0; x < parts.length; x++) {
            parse(parts[x]).then(function(data) {
                str+=data;
            });
        }
        this.sendReply('str is '+str);

    }
};

function parse (link) {
        return new Promise(function(resolve, reject) {
            request(link, function(err, res, body) {
                if (!err && res.statusCode == 200) {
                    var $ = cheerio.load(body);
                    var title = $("title").text();
                    var str = '<a href="' + link + '"><button title="' + title + '">' + title + '</a></button><br />'; //parse it now
                    resolve(str);
                } else {
                    reject(str);
                }
            });
        });
};