implode explode multiselect

//helper
//kondisi kamar
function kondisi($name, $table, $field, $id_kamar, $selected, $hitung) {
    $ci = get_instance();
    $cmb = "<select id='$name' name='kondisi[]' class='select2_multiple form-control' multiple='multiple'>";
    $cmb .= "<option value=''>--Pilih--</option>";
    $ci->db->order_by($field,'ASC');
    $data = $ci->db->get($table)->result();
    $a=0;
    foreach ($data as $d) {
        $cmb .="<option value='" . $d->$field . "'";
        //$cmb .=set_select('perlengkapan', $d->$field);
        $cmb .= $selected[$a] == $d->$field ? " selected='selected'" : '';
        $cmb .=">" . strtoupper($d->$field) . "</option>";

        if($a<3){
            $a++;
        }
    }
    $cmb .="</select>";

    return $cmb;
}


//view
<?php
$kondisi = Array ( [0] => AC Bagus [1] => Atap Bagus [2] => Kursi Bagus )

                function split_nth($str, $delim, $n)
                {
                  return array_map(function($p) use ($delim) {
                      return implode($delim, $p);
                  }, array_chunk(explode($delim, $str), $n));
                }
                $array = split_nth($kondisi, " ", 2);

				echo kondisi('kondisi', 'status_kamar', 'kondisi', 'id', $array);
?>