form validation with array not working - codeigniter

Question

On my form I have some check boxes. And they are in an array. When I submit my form for some reason it clears the Modify check boxes. And then when go back to look not checked.
I have know what's causing issue is $this->form_validation->set_rules('permission[modify]', '', 'callback_modify_check_edit')
It does not seem to like, permission[modify] or permission[modify][] on the set_rules
How am I able to solve this?
Controller Edit Function:
public function edit() {
$this->load->library('form_validation');
$this->form_validation->set_rules('name', 'User Group Name', 'required');
$this->form_validation->set_rules('user_group_id', 'User Group Id', 'required');
$this->form_validation->set_rules('permission[modify]', '', 'callback_modify_check_edit');
if ($this->form_validation->run($this) == FALSE) {
$this->getForm();
} else {
$this->load->model('admin/user/model_user_group');
$this->model_user_group->editUserGroup($this->uri->segment(4), $this->input->post());
$this->db->select('permission');
$this->db->from($this->db->dbprefix . 'user_group');
$this->db->where('user_group_id', $this->session->userdata('user_group_id'));
$user_group_query = $this->db->get();
$permissions = unserialize($user_group_query->row('permission'));
$this->session->set_userdata($permissions);
$this->session->set_flashdata('success', 'Congratulations you have successfully modified' .' '. "<strong>" . ucwords(str_replace('_', ' ', $this->router->fetch_class())) .' '. $this->input->post('name') . "</strong>");
redirect('admin/users_group');
}
}
public function modify_check_edit() {
if (!in_array('users_group', $this->session->userdata('modify'))) {
$this->form_validation->set_message('modify_check_edit', 'You do not have permission to edit' );
}
}
View Form:
<?php echo validation_errors('<div class="alert alert-warning text-center"><i class="fa fa-exclamation-triangle"></i>
', '</div>'); ?>
<?php if ($this->uri->segment(4) == FALSE) { ?>
<?php $data = array('class' => 'form-horizontal', 'id' => 'users_group');?>
<?php echo form_open('admin/users_group/add', $data);?>
<?php } else { ?>
<?php $data = array('class' => 'form-horizontal', 'id' => 'users_group');?>
<?php echo form_open('admin/users_group/edit' .'/'. $this->uri->segment(4), $data);?>
<?php } ?>
<div class="form-group">
<?php $data = array('class' => 'col-sm-2 control-label');?>
<?php echo form_label('User Group Name', 'name', $data);?>
<div class="col-sm-10">
<?php
$data_user_name = array(
'id' => 'name',
'name' => 'name',
'class' => 'form-control',
'value' => $name
)
;?>
<?php echo form_input($data_user_name);?>
</div>
</div>
<div class="form-group">
<?php $data = array('class' => 'col-sm-2 control-label');?>
<?php echo form_label('User Group Id', 'user_group_id', $data);?>
<div class="col-sm-10">
<?php
$data_user_group_id = array(
'id' => 'user_group_id',
'name' => 'user_group_id',
'class' => 'form-control',
'value' => $user_group_id
)
;?>
<?php echo form_input($data_user_group_id);?>
</div>
</div>
<div class="form-group">
<?php $data = array('class' => 'col-sm-2 control-label');?>
<?php echo form_label('Access Permission', 'permission_access', $data);?>
<div class="col-sm-10">
<div class="well well-sm" style="height: 200px; overflow: auto;">
<?php foreach ($permissions as $permission) { ?>
<div class="checkbox">
<label>
<?php if (in_array($permission, $access)) { ?>
<?php
$data_checked = array(
'name' => 'permission[access][]',
'id' => 'permission_access',
'value' => $permission,
'checked' => TRUE,
);
echo form_checkbox($data_checked);
?>
<?php echo $permission; ?>
<?php } else { ?>
<?php
$data_not_checked = array(
'name' => 'permission[access][]',
'id' => 'permission_access',
'value' => $permission,
'checked' => FALSE,
);
echo form_checkbox($data_not_checked);
?>
<?php echo $permission; ?>
<?php } ?>
</label>
</div>
<?php } ?>
</div>
<a onclick="$(this).parent().find(':checkbox').prop('checked', true);">Select All</a> / <a onclick="$(this).parent().find(':checkbox').prop('checked', false);">Unselect All</a></div>
</div>
<div class="form-group">
<?php $data = array('class' => 'col-sm-2 control-label');?>
<?php echo form_label('Modify Permission', 'permission_modify', $data);?>
<div class="col-sm-10">
<div class="well well-sm" style="height: 200px; overflow: auto;">
<?php foreach ($permissions as $permission) { ?>
<div class="checkbox">
<label>
<?php if (in_array($permission, $modify)) { ?>
<?php
$data = array(
'name' => 'permission[modify][]',
'id' => 'permission_modify',
'value' => $permission,
'checked' => TRUE,
);
echo form_checkbox($data);
?>
<?php echo $permission; ?>
<?php } else { ?>
<?php
$data = array(
'name' => 'permission[modify][]',
'id' => 'permission_modify',
'value' => $permission,
'checked' => FALSE,
);
echo form_checkbox($data);
?>
<?php echo $permission; ?>
<?php } ?>
</label>
</div>
<?php } ?>
</div>
<a onclick="$(this).parent().find(':checkbox').prop('checked', true);">Select All</a> / <a onclick="$(this).parent().find(':checkbox').prop('checked', false);">Unselect All</a></div>
</div>
<?php echo form_close();?>

Answer 1

After a good half hour trying to figure it out it was mostly part of the call back not to working with th set_rules() for permission[modify]
Just fixed code here for call back and seems to be working now.
public function modify_check_edit() {
$this->load->library('form_validation');
if (is_array($this->session->userdata('modify'))) {
$permission = !in_array('users_group', $this->session->userdata('modify'));
if ($permission) {
$this->form_validation->set_message('modify_check_edit', 'You do not have permission to one' .' '. "<strong>" . ucwords(str_replace('_', ' ', $this->router->fetch_class())) .' '. $this->input->post('name') . "</strong>");
return FALSE;
} else {
return TRUE;
}
return TRUE;
} else {
$this->form_validation->set_message('modify_check_edit', 'You do not have permission to one' .' '. "<strong>" . ucwords(str_replace('_', ' ', $this->router->fetch_class())) .' '. $this->input->post('name') . "</strong>");
return FALSE;
}
}