Laravel helper method for active the sidebar

I am trying to use the laravel helper method for active the sidebar but it does not working. Can anyone tell us how to apply Laravel helper method to this sidebar. Here this is my sidebar.blade.php file

<aside class="main-sidebar sidebar-dark-primary">
    <!-- Main Sidebar Container -->
    <!-- Brand Logo -->
    <a href="{{url('dashboard')}}" class="brand-link">
        <img src="{{asset('assets/adminlte-boot-4/dist/img/AdminLTELogo.png')}}" alt="Digital CRM" class="brand-image img-circle elevation-3"
             style="opacity: .8">
        <span class="brand-text font-weight-light">DIgital CRM</span>
    </a>

    <!-- Sidebar -->
    <div class="sidebar-menu">
        <!-- Sidebar user panel (optional) -->


        <!-- Sidebar Menu -->
        <nav class="mt-2">
            <ul class="nav nav-pills nav-sidebar flex-column" data-widget="treeview" role="menu" data-accordion="false">
                <!-- Add icons to the links using the .nav-icon class
                     with font-awesome or any other icon font library -->

                <li class="nav-item">
                    <a href="{{url('dashboard')}}" class="nav-link">
                        <i class="nav-icon fas fa-tachometer-alt"></i>
                        <p>Dashboard</p>
                    </a>
                </li>


                <li class="nav-item">
                    <a href="{{url('webtolead')}}" class="nav-link">
                        <i class="nav-icon fas fa-file"></i>
                        <p>Web to Lead</p>
                    </a>
                </li>
               </ul>
        </nav>
        <!-- /.sidebar-menu -->
    </div>
    <!-- /.sidebar -->
</aside>