public function ajax_find_students()
 {
     $lib = new college_lib_ad();
     $lib->ajax_find_students();
 }
<?php

$use = new class_loader();
$use->use_lib('admin/college_lib_ad');
$lib = new college_lib_ad();
$data = $lib->find($_GET['id']);
if ($data == false) {
    redirect('admin/college');
}
$data = array_shift($data);
?>
<div class="col-sm-12 main">
    <div class="row page-header">
        <div class="col-sm-2"><h5><b><a href="<?php 
echo site_url('admin/college');
?>
">College : </a> </b> </h5></div>
        <div class="col-sm-2"><h5> <?php 
echo $data[tpl_college::name()];
?>
 </h5></div>
    </div>
    <div class="row">
        <div class="col-sm-6">
            <h3 class="page-header">Number Students</h3>
            <div class="table-responsive">
                <table id="table_srudent" data-toggle="table"
                       data-url="<?php 
echo site_url('admin/college/ajax_students');
?>
"