<ul class="nav vertical-nav-menu metismenu" style="display:block">
    <?php
    foreach($tabs as $key => $value)
    {
        {
            echo '
                <li class="tb pikachu" data-tab="'.$value.'" data-serial="'.$key.'" style="cursor:pointer" >
                    <a role="tab" data-toggle="tab" href="#tab-eg7-'.$key.'">
                        '.$value.'
                    </a>
                </li>
            ';
        }
        
    }
    ?>
</ul>
   