{
    "11153" : {
        "sub" : {
            "11411" : {
                "id" : "994834",
                "source_api" : "all",
                "tanggal" : "2016-06-14",
                "instansi_id" : "11411",
                "belum" : "12",
                "proses" : "23",
                "selesai" : "7",
                "parent_nid" : "11153",
                "InstansiName" : "Dinas PSDA dan ESDM Kota Semarang",
                "sub" : [],
                "rtl" : "5.30"
            },
        }
    }
}

<?php
$data = '{
    "11153" : {
        "sub" : {
            "11411" : {
                "id" : "994834",
                "source_api" : "all",
                "tanggal" : "2016-06-14",
                "instansi_id" : "11411",
                "belum" : "12",
                "proses" : "23",
                "selesai" : "7",
                "parent_nid" : "11153",
                "InstansiName" : "Dinas PSDA dan ESDM Kota Semarang",
                "sub" : [],
                "rtl" : "5.30"
            }
        }
    }
}'; // initial data

$new_array = json_decode($data,true); // decode data to convert it to array
echo "<pre/>";print_r($new_array); // print the array
echo $new_array[11153]['sub'][11411]['belum'];// you can print others like this

$array=json_decode($json_string,true);

<?php
    echo $array["11153"]["sub"]["11411"]["belum"]; // get belum
    echo $array["11153"]["sub"]["11411"]["proses"]; // get proses
    echo $array["11153"]["sub"]["11411"]["selesai"]; // selesai

<?php
     echo $array["arraykey"][0];

<?php
         for($i=0;$i<sizeof($array["arraykey"]);$i++) {
             echo $array["arraykey"][$i];