Codeigniter Menu Admin LTE

// STRUKTUR MENU navigation.php

<?php
defined('BASEPATH') OR exit('No direct script access allowed');

$m_user=array(
    rb_lang('rimbun','user_menu','User Menu')=>array(
        'icon'=>'fa fa-users',
        's1'=>'core',
        's2'=>'auth',
        'child'=>array(
            rb_lang('rimbun','user_menu_role','Roles')=>array(
                'icon'=>'fa fa-key',
                'url'=>'core/auth/role',
            ),
            rb_lang('rimbun','user_menu_user','Users')=>array(
                'icon'=>'fa fa-users',
                'url'=>'core/auth/users',
            ),
        ),
    ),
);

$m_config=array(
    rb_lang('rimbun','config_menu','Configuration')=>array(
        'icon'=>'fa fa-gear',
        's1'=>'core',
        's2'=>'configuration',
        'child'=>array(
            rb_lang('rimbun','config_menu','Application')=>array(
                'icon'=>'fa fa-star',
                'url'=>'core/configuration/application',
            ),
            rb_lang('rimbun','config_menu_company','Company')=>array(
                'icon'=>'fa fa-building',
                'url'=>'core/configuration/company',
            ),
            rb_lang('rimbun','config_menu_logo','Logo & Favicon')=>array(
                'icon'=>'fa fa-image',
                'url'=>'core/configuration/logo',
            ),
            rb_lang('rimbun','config_menu_menu','Menu Manager')=>array(
                'icon'=>'fa fa-cube',
                'url'=>'core/configuration/menu',
            ),
        ),
    ),
);

$m_tools=array(
    rb_lang('rimbun','tool_menu','Tools')=>array(
        'icon'=>'fa fa-wrench',
        's1'=>'core',
        's2'=>'tools',
        'child'=>array(
            rb_lang('rimbun','tool_menu_document','Documentation Editor')=>array(
                'icon'=>'fa fa-book',
                'url'=>'core/tools/docedit',
            ),
            rb_lang('rimbun','tool_menu_config','Configuration Editor')=>array(
                'icon'=>'fa fa-book',
                'url'=>'core/tools/config',
            ),
            rb_lang('rimbun','tool_menu_db','Database Explorer')=>array(
                'icon'=>'fa fa-database',
                'url'=>'core/tools/dbutility',
            ),
            rb_lang('rimbun','tool_menu_update','Check For Update')=>array(
                'icon'=>'fa fa-database',
                'url'=>'core/tools/update',
            ),
        ),
    ),
);



$menu=array_merge($m_user,$m_config,$m_tools);

//APPEND HTML MENU

<?php
$navFile=FCPATH."views/nav/navigation.php";
if(file_exists($navFile) && is_file($navFile))
{
require_once($navFile);
function generate_menu($menu)
{
    $output='';
    foreach($menu as $k=>$v)
    {
        $parentClass="treeview";
        $parentSubClass="treeview-menu";

        $Slug_1=isset($v['s1'])?$v['s1']:"";
        $Slug_2=isset($v['s2'])?$v['s2']:"";
        $Slug_3=isset($v['s3'])?$v['s3']:"";
        $url=isset($v['url'])?$v['url']:"";
        $target=isset($v['target'])?$v['target']:"";
        $icon=isset($v['icon'])?$v['icon']:"fa fa-circle-o";
        $aktif='';

        if(isset($v['child']))
        {
            if(menu_active($Slug_1,$Slug_2,$Slug_3)==TRUE)
            {
                $aktif="active";
            }
            $output.='
            <li class="'.$parentClass.' '.$aktif.'">
                <a href="javascript:;">
                    <i class="'.$icon.'"></i> <span>'.$k.'</span>
                    <span class="pull-right-container">
                      <i class="fa fa-angle-left pull-right"></i>
                    </span>
                </a>
            ';
            $output.='<ul class="'.$parentSubClass.'">';
            $output.=generate_menu($v['child']);
            $output.='</ul>';
            $output.='</li>';
        }else{
            if(menu_active($Slug_1,$Slug_2,$Slug_3)==TRUE)
            {
                $aktif="active";
            }
            $output.='
            <li>
                <a href="'.base_url().$url.'"
                    target="'.$target.'">
                    <i
                    class="'.$icon.'"></i>
                    '.$k.'
                </a>
            </li>
            ';
        }
    }
    return $output;
}
echo generate_menu($menu);
}
?>