$(document).ready(function(){
    $('p.images img, .lead img').each(function(){
        var href = $(this).attr('src');
        href = href.replace('_thumb','');
        href = href.replace('img/','img/flexxcon/');
        var link = $('<a href="'+href+'" rel="fancybox"></a>');
        link.fancybox();
        $(this).wrap(link);
    });
});