Rotate image on toggle with jQuery

Question

Site in question: http://mtthwbsh.com

I\'m attempting to create a collapsable nav where when toggled, the arrow points up (and down when hidden).

I\'ve been

Answer 1

Check this, maybe can help somebody http://jsfiddle.net/gkmagvo3/515/

Some css:

.rotate {
    transform: rotate(-180deg);
    /*transform: rotate(180deg);*/
    transition: .3s;
}
.rotate-reset {
    transform: rotate(0deg);
    transition: .3s;
}

And javascript:

$('.arrow').on("click", function (event) {
    $('.arrow-img').toggleClass('rotate');
    $('.arrow-img').toggleClass('rotate-reset');
});