Дмитрий Кривошеин

$('#modal-login-form').on('click', function () {
    $.get($(this).attr('data-target'))
        .then(function (response) {
            $('#modal').modal('show')
                .find('#modal-content').html(response);
        });

    return false;
});

$(function () {
        if (location.hash == '#login') { 
            var login_form = $('#modal-login-form');
            $('#modal').modal('show')
                .find('#modal-content')
                .load(login_form.attr('data-target'));
        }
    });