jQuery.fn.anteDownload = function(secuFolder)
{
    var all = jQuery(this);

    
    all.each(function(){
        var tag = jQuery(this);
        var url = tag.attr('href');
        if(url && url.indexOf('/' + secuFolder + '/')){
           var urlParts = url.split('/' + secuFolder + '/');
           if(urlParts.length == 2){
              tag.attr('href',urlParts[0] + '/../php/sdownload.php?file=' + urlParts[1]);
           }   
        }    
        
    });
}

jQuery(document).ready(function(){
    jQuery('a').anteDownload('sdownload');
});