admin_side_nav.php

<!-- Main Sidebar Container -->
<aside class="main-sidebar sidebar-dark-<?php echo nullable_htmlentities($config_theme); ?> d-print-none">

  <a class="brand-link pb-1 mt-1" href="clients.php">
    <p class="h6"><i class="nav-icon fas fa-arrow-left ml-3 mr-2"></i> Back | <strong>Administration</strong></p>
  </a>

  <!-- Sidebar -->
  <div class="sidebar">

    <!-- Sidebar Menu -->
    <nav>

      <ul class="nav nav-pills nav-sidebar flex-column" data-widget="treeview" data-accordion="false">

        <li class="nav-header">ACCESS</li>

        <li class="nav-item">
          <a href="admin_users.php" class="nav-link <?php if (basename($_SERVER["PHP_SELF"]) == "admin_users.php") { echo "active"; } ?>">
            <i class="nav-icon fas fa-users"></i>
            <p>Users</p>
          </a>
        </li>

        <li class="nav-item">
          <a class="nav-link <?php if (basename($_SERVER["PHP_SELF"]) == "admin_api.php") { echo "active"; } ?>"
             href="admin_api.php">
              <i class="nav-icon fas fa-key"></i>
              <p>API Keys</p>
          </a>
        </li>

        <li class="nav-header mt-3">TAGS & CATEGORIES</li>

        <li class="nav-item">
          <a href="admin_tags.php" class="nav-link <?php if (basename($_SERVER["PHP_SELF"]) == "admin_tags.php") { echo "active"; } ?>">
            <i class="nav-icon fas fa-tags"></i>
            <p>Tags</p>
          </a>
        </li>

        <li class="nav-item">
          <a href="admin_categories.php" class="nav-link <?php if (basename($_SERVER["PHP_SELF"]) == "admin_categories.php") { echo "active"; } ?>">
            <i class="nav-icon fas fa-list-ul"></i>
            <p>Categories</p>
          </a>
        </li>
        <!-- ---------------------- TODO: Custom Fields ----------------------
        <li class="nav-item">
          <a href="settings_custom_fields.php" class="nav-link <?php //if (basename($_SERVER["PHP_SELF"]) == "settings_custom_fields.php") { echo "active"; } ?>">
            <i class="nav-icon fas fa-th-list"></i>
            <p>Custom Fields</p>
          </a>
        </li>
        -->

        <li class="nav-item">
          <a href="admin_taxes.php" class="nav-link <?php if (basename($_SERVER["PHP_SELF"]) == "admin_taxes.php") { echo "active"; } ?>">
            <i class="nav-icon fas fa-balance-scale"></i>
            <p>Taxes</p>
          </a>
        </li>
        
        <li class="nav-item">
          <a href="admin_account_types.php" class="nav-link <?php if (basename($_SERVER["PHP_SELF"]) == "admin_account_types.php") { echo "active"; } ?>">
            <i class="nav-icon fas fa-money-bill-wave"></i>
            <p>Account Types</p>
          </a>
        </li>

        <li class="nav-header mt-3">TEMPLATES</li>

        <li class="nav-item">
          <a href="admin_vendor_templates.php" class="nav-link <?php if (basename($_SERVER["PHP_SELF"]) == "admin_vendor_templates.php") { echo "active"; } ?>">
            <i class="nav-icon fas fa-building"></i>
            <p>Vendor Templates</p>
          </a>
        </li>

        <li class="nav-item">
          <a href="admin_software_templates.php" class="nav-link <?php if (basename($_SERVER["PHP_SELF"]) == "admin_software_templates.php") { echo "active"; } ?>">
            <i class="nav-icon fas fa-rocket"></i>
            <p>License Templates</p>
          </a>
        </li>

        <li class="nav-item">
          <a href="admin_document_templates.php" class="nav-link <?php if (basename($_SERVER["PHP_SELF"]) == "admin_document_templates.php" || basename($_SERVER["PHP_SELF"]) == "admin_document_template_details.php") { echo "active"; } ?>">
            <i class="nav-icon fas fa-file"></i>
            <p>Document Templates</p>
          </a>
        </li>

        <li class="nav-header mt-3">MAINTENANCE</li>

        <li class="nav-item">
          <a href="admin_mail_queue.php" class="nav-link <?php if (basename($_SERVER["PHP_SELF"]) == "admin_mail_queue.php") { echo "active"; } ?>">
            <i class="nav-icon fas fa-mail-bulk"></i>
            <p>Mail Queue</p>
          </a>
        </li>

        <li class="nav-item">
          <a href="admin_logs.php" class="nav-link <?php if (basename($_SERVER["PHP_SELF"]) == "admin_logs.php") { echo "active"; } ?>">
            <i class="nav-icon fas fa-history"></i>
            <p>Audit Logs</p>
          </a>
        </li>

        <li class="nav-item">
          <a class="nav-link <?php if (basename($_SERVER["PHP_SELF"]) == "admin_backup.php") { echo "active"; } ?>"
            href="admin_backup.php">
            <i class="nav-icon fas fa-cloud-upload-alt"></i>
            <p>Backup</p>
          </a>
        </li>

        <li class="nav-item">
          <a href="admin_debug.php" class="nav-link <?php if (basename($_SERVER["PHP_SELF"]) == "admin_debug.php") { echo "active"; } ?>">
            <i class="nav-icon fa fa-bug"></i>
            <p>Debug</p>
          </a>
        </li>

        <li class="nav-item">
          <a class="nav-link <?php if (basename($_SERVER["PHP_SELF"]) == "admin_update.php") { echo "active"; } ?>"
            href="admin_update.php">
            <i class="nav-icon fas fa-download"></i>
            <p>Update</p>
          </a>
        </li>

      </ul>
    </nav>
    <!-- /.sidebar-menu -->

    <div class="mb-3"></div>

  </div>
  <!-- /.sidebar -->
</aside>