Undefined variable: admin_id

Make sure you have an array key named 'admin_id' in your controller, and pass the array to the view.

Controller:

PHP Code:

$data['admin_id'] = 123;
$data['other_stuff'] = 'Other stuff';
$this->load->view('admins\admin-profile', $data); 


This way, the $admin_id variable is also available in your view.

Even better: get the $profile_info records in your controller instead of the view.
Controller:

PHP Code:

$data['profile_info'] = $this->db->get_where('admin' , array('admin_id' => $admin_id))->result_array();
$this->load->view('admins\admin-profile', $data); 


Now, in your view, $profile_info is an array that you can loop through.

And even better than that: create a model to retrieve the records from your database and use CI's query builder.
Model (Admin_model.php):

PHP Code:

public function get_admin_profile($admin_id)
{
   $query = $this->db->where('admin_id', $admin_id)->get('admin');
   if ($query->num_rows() == 0) {
     return FALSE;
   else {
     return query->result_array();
   }
} 


Controller:

PHP Code:

$this->load->model('admin_model');
$data['profile_info'] = $this->admin_model->get_admin_profile(123);
$this->load->view('admins\admin-profile', $data); 


This will keep your controllers lean. Load the model in any controller where you need the admin profile.