Merhaba Arkadaşlar
tema değişikliğinden dolayı PHP header menümü aşağıdaki html yapıya uygulama yapamadım, bu konuda yardımcı olabilirmisiniz

<?php
function site_menu_listele($id = 0){
    global $db;
    global $menu_alt;
    $query = $db->prepare("SELECT * FROM menu WHERE menu_ust=:menu_id AND menu_durum=:menu_durum AND menu_dil=:menu_dil ORDER BY menu_sira ASC");
    $query->execute(["menu_id" => $id, "menu_durum" => 1, "menu_dil" => $_SESSION["language"]]);
    $goster = $query->fetchAll(PDO::FETCH_ASSOC);
    $x = $query->rowCount();
    $menu_alt = 0;
    if ($x){
        foreach ($goster as $row){
            $alt_kategori = $db->prepare("SELECT * FROM menu WHERE menu_ust=:menu_id AND menu_durum=:menu_durum AND menu_dil=:menu_dil ORDER BY menu_sira ASC");
            $alt_kategori->execute(["menu_id" => $row["menu_id"], "menu_durum" => 1, "menu_dil" => $_SESSION["language"]]);
            $alt_kategori_say = $alt_kategori->rowcount();
            if (0 < $alt_kategori_say){
                $menu_alt = 1;
            }
            $ikon = $row["menu_ikon"];
            $menu_ikon = "";
            if (trim($ikon) == NULL){
                $menu_ikon = "";
            } else {
                $menu_ikon = "<i class='fa ".$ikon."'></i>";
            }
            $menu_yon = "right";
            $menu_yon_side = "";
            if ($row["menu_yon"] == 1){
                $menu_yon = "right";
            } else {
                $menu_yon = "left";
                $menu_yon_side = "left-side";
            }
            $menu_url = $row["menu_url"];
            $menu_sekme = "";
            if ($row["menu_sekme"] == 1){
                $menu_sekme = "target=\"_blank\"";
            }
            echo "<li><a href=\"";
            include "menulink.php";
            echo "\"";
            echo $menu_sekme;
            echo " style='text-transform:none;padding-left:10px;padding-right:10px;'>\r\n";
            echo "".$menu_ikon."";
            echo $row["menu_ad"];
            if ($row["menu_ust"] == 0){
                if ($menu_alt == 0){
                    echo "</a><ul>";
                } else {
                    echo "<i class=\"fa fa-angle-down fa-indicator\"></i></a><ul class=\"drop-down-multilevel \">";
                }
            } else {
                if ($menu_alt == 0){
                    echo "</a><ul class='".$menu_yon_side."'>";
                } else {
                    echo " <i class='fa fa-angle-".$menu_yon." fa-indicator'></i> </a><ul class='drop-down-multilevel ".$menu_yon_side."'>";
                }
            }
            site_menu_listele($row["menu_id"]);
            echo "</ul></li>";
        }
    } else {
        return false;
    }
}
?>
<div class="collapse navbar-collapse" id="main-navbar">
<ul class="navbar-nav mr-auto w-100 justify-content-center">
<li class="nav-item dropdown">
                <a class="nav-link dropdown-toggle" href="#" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                  Pages <i class="fa fa-angle-down"></i>
                </a>
                <div class="dropdown-menu">
                  <a class="dropdown-item" href="about.html">About Us</a>
                  <a class="dropdown-item" href="agents.html">Agents</a>
                  <a class="dropdown-item" href="rent.html">For Rent</a>
                  <a class="dropdown-item" href="sale.html">For Sale</a>
                  <a class="dropdown-item" href="pricing.html">Pricing Tables</a>
                  <a class="dropdown-item" href="dashboard.html">Dashboard</a>
                  <a class="dropdown-item" href="submit-property.html">Submission Form</a>
                  <a class="dropdown-item" href="faq.html">FAQ</a>
                  <a class="dropdown-item" href="testimonials.html">Testimonials</a>
                  <a class="dropdown-item" href="typography.html">Typography</a>
                </div>
              </li>
              <li class="nav-item">
                <a class="nav-link" href="contact.html">
                  Contact Us
                </a>
              </li>
            </ul>
</div>