链接转标签

var pattern = /(ftp|http|https):\/\/(\w+:{0,1}\w*@)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?/g
var description = '12345678910 http://www.nanakon.com/1 abcdefg http://www.cnblogs.com/rubylouvre/archive/2010/03/09/1681222.html'
description = description.replace(pattern, function(link) {
    var newlink = link.split('//')[1]
    return '<a href="' + link + '">' + _B.truncate(newlink, 40) + '</a>'
})
console.log(description)
//12345678910 <a href="http://www.nanakon.com/1">www.nanakon.com/1</a> abcdefg <a href="http://www.cnblogs.com/rubylouvre/archive/2010/03/09/1681222.html">www.cnblogs.com/rubylouvre/archive/20...</a>