filters.js

app.filter('parseUrl', function () {
    var replacements = [
        {
            //URLs starting with http://, https://, or ftp://
            search: /(\b(https?|ftp):\/\/[-A-Z0-9+&@#\/%?=~_|!:,.;]*[-A-Z0-9+&@#\/%=~_|])/gim,
            replace: '<a href="$1" target="_blank">$1</a>'
        },
        {
            //URLs starting with "www." (without // before it, or it'd re-link the ones done above).
            search: /(^|[^\/])(www\.[\S]+(\b|$))/gim,
            replace: '$1<a href="http://$2" target="_blank">$2</a>'
        },
        {
            //Change email addresses to mailto:: links.
            search: /(\w+@[a-zA-Z_]+?\.[a-zA-Z]{2,6})/gim,
            replace: '<a href="mailto:$1">$1</a>'
        }
    ];

    return function (text) {
        for (var i = 0; replacements.length > i; i++) {
            text = text.replace(replacements[i].search, replacements[i].replace);
        }

        return text;
    };
});