Fetch corresponding value of a drop downlist - codeigniter

Question

I want to fetch the corresponding value of my dropdown the image below shows the form and the database. the table was inside the javascript and Iam having a dificult time in figuring out this problem. please help me how to solve this problem... Thank you very much in advance...
Database
forms entry
My Controller
function getFeetypeEndDate() {
$feetype_id = $this->input->get('feety_id[]');
$data = $this->feegroup_model->getFeetypeByEndDate($feetype_id);
echo json_encode($data);
}
My Model
public function get($id = null) {
$this->db->select()->from('feetype');
$this->db->where('is_system', 0);
if ($id != null) {
$this->db->where('id', $id);
} else {
$this->db->order_by('id');
}
$query = $this->db->get();
if ($id != null) {
return $query->row_array();
} else {
return $query->result_array();
}
}
My Javascript in the View Section
<script>
$(document).ready(function (){
$("body").on('click', '.btn-add-more', function (e) {
e.preventDefault();
var amount = $("#amount").val();
var penalty = $("#penalty").val();
var $sr = ($(".jdr1").length + 1);
var rowid = Math.random();
var $html = '<tr class="jdr1" id="' + rowid + '">' +
'<td><span class="btn btn-sm btn-default">' + $sr + '</span><input type="hidden" name="count[]" value="'+Math.floor((Math.random() * 10000) + 1)+'"></td>' +
'<td><select id="feetype_id[]" name="feetype_id[]" class="form-control" >' +
'<?php foreach ($feetypeList as $feetype) { ?>' +
' <option value="<?php echo $feetype['id'] ?>" ' +
'<?php if (set_value('feetype_id[]') == $feetype['id']) { echo "selected =selected"; } ?>><?php echo $feetype['type'] ?></option> <?php $count++; } ?> </select></td>' +
'<td><input type="text" id="startDate" name="startDate" value="<?php echo date($this->customlib->getSchoolDateFormat($feetype->start_date), $this->customlib->dateyyyymmddTodateformat($feetype->start_date)); ?>" placeholder="Start Date" class="form-control input-sm"/></td>' +
'<td><input type="text" id="endDate" name="endDate" value="<?php echo date($this->customlib->getSchoolDateFormat($feetype->end_date), $this->customlib->dateyyyymmddTodateformat($feetype->end_date)); ?>" placeholder="End Date" class="form-control input-sm"/></td>' +
'<td><input type="text" name="amount_td[]" placeholder="Amount" class="form-control input-sm" value="'+amount+'"></td>' +
'<td><input type="text" name="penalty_td" placeholder="Penalty" class="form-control input-sm" value="'+penalty+'"></td>' +
'</tr>';
$("#table-details").append($html);
});
$("body").on('click', '.btn-remove-detail-row', function (e) {
e.preventDefault();
if($("#table-details tr:last-child").attr('id') != 'row1'){
$("#table-details tr:last-child").remove();
}
});
});