Revert a jQuery function, from xml to html and back

Hy all, i have to work with xml files in jQuery, and jQuery can't work with < > & and other codes, so i found this code on google:

function escapeHtml(text) {
    var map = {
        '&': '&',
        '<': '&lt;',
        '>': '&gt;',
    };
    return text.replace(/[&<>]/g, function(m) {
        return map[m];
    });
}

its working for me, but now i need to export this file, and it returns with < > as text, is there a way to revert this back?