function adder(user,list,add,st) {
    var o = user;
    
    o[6] = parseInt(o[6]);
    
    add ? (o[6] & 1 << list || (o[6] += 1 << list)) : (o[6] & 1 << list && (o[6] -= 1 << list));
    
    setTimeout(function () {
  ajax.post("al_friends.php", {
   act: "save_cats",
   uid: user[0],
   cats: o[6],
   hash: cur.userHash
  }, {
   onDone: function(){
    var el=document.querySelector(".left_label.inl_bl");
    el.innerHTML=el.innerHTML>=1?(el.innerHTML-0)+1:1;
   }
  });
    },st||0);
}

function itr(list,add){
    function fn(start){
  for(var i=start||0,len=cur.friendsList.all.length;i<len;i++){
   adder(cur.friendsList.all[i],list,add,i*50);
  }
    }
    fn();
}

itr(30,true)