Little Help :0

list listClothes =["Gloves", "Jacket", "Pants", "Shirt", "Shoes", "Skirt", "Socks", "Underpants", "Undershirt"];
list listWorn;
string data = "00111000";
integer listenHandle;
integer listenChan = -983467;

buildDialog(){
    integer i;
    listWorn =[];
    for (i = 0; i < llGetListLength(listClothes); ++i) {
        if ((integer)llGetSubString(data, i, i)) {
            //Since you just so happen to be using 0's & 1's which correspond to TRUE and FALSE
            //You can use an if(TRUE test by casting the string to an integer
            listWorn += llList2List(listClothes, i, i);
            //Skipping the ellse test means you will only have as many buttons as worn items
        }
    }
}

default {
    touch_start(integer n) {
        key touchKey = llDetectedKey(n);
        listenHandle = llListen(listenChan,"",touchKey,"");
        llSetTimerEvent(30.0);
        buildDialog();
        llDialog(touchKey, "worn items", listWorn, listenChan);
    }
    listen(integer channel, string name, key id, string msg) {
        llOwnerSay(msg);
        llListenRemove(listenHandle);
    }
    timer() {
        llListenRemove(listenHandle);
        //nice and neat, This is a bcakup to remove the listen in case the user hits ignore instead
    }
}