<?
function build_hidden_form($array,$level=0,$keys=null){
    if($keys == null)
        $keys = array();
    $elements = array();

    foreach($array as $key=>$value){
        if(is_array($value)){
            $k = $keys;
            $k[$level] = $key;
            $elements = array_merge($elements,build_hidden_form($value,$level+1,$k));
        } else if($level == 0){
            $elements[] = "<input name='$key' value='$value' type='hidden'>";
        } else {
            $s = "";
            $name = $keys[0];
            for($i=1;$i<$level;$i++){
                $name .= "[".$keys[$i]."]";
            }
            $name .= "[]";
            $elements[] = "<input name='$name' value='$value' type='hidden'>";
        }
    }
    return $elements;
}
?>