PrestaShop 1.7：自定义模块中正确获取并显示分类链接

<?php
// 假设这是您的模块主文件中的某个方法，例如 renderWidget 或 hookDisplayHome
// ...

// 获取所有分类数据
$allCategories = Category::getNestedCategories(null, $this->context->language->id);

// 将分类数据和 Link 对象赋值给 Smarty
$this->context->smarty->assign(array(
    'allCategories' => $allCategories,
    'link' => $this->context->link, // 关键步骤：将 Link 对象赋值给 Smarty
));

// 渲染模板
return $this->fetch('module:'.$this->name.'/views/templates/widget/block.tpl');

// ...
?>

{* views/templates/widget/block.tpl *}

{foreach from=$allCategories item=mainCategory}
   {* 生成主分类链接 *}
   <a href="{$link->getCategoryLink($mainCategory.id_category, $mainCategory.link_rewrite)|escape:'html':'UTF-8'}"
      title="{$mainCategory.name|escape:'htmlall':'UTF-8'}">
       {$mainCategory.name|escape:'htmlall':'UTF-8'}
   </a>

   {* 遍历子分类（如果存在） *}
   {if isset($mainCategory.children) && !empty($mainCategory.children)}
       <ul>
       {foreach from=$mainCategory.children item=subCategory}
           <li>
               <a href="{$link->getCategoryLink($subCategory.id_category, $subCategory.link_rewrite)|escape:'html':'UTF-8'}"
                  title="{$subCategory.name|escape:'htmlall':'UTF-8'}">
                   {$subCategory.name|escape:'htmlall':'UTF-8'}
               </a>
           </li>
       {/foreach}
       </ul>
   {/if}
{/foreach}

<?php
if (!defined('_PS_VERSION_')) {
    exit;
}

class YourModule extends Module
{
    public function __construct()
    {
        $this->name = 'yourmodule';
        $this->tab = 'front_office_features';
        $this->version = '1.0.0';
        $this->author = 'Your Name';
        $this->need_instance = 0;
        $this->ps_versions_compliancy = [
            'min' => '1.7',
            'max' => _PS_VERSION_,
        ];
        $this->bootstrap = true;

        parent::__construct();

        $this->displayName = $this->l('My Custom Category Display Module');
        $this->description = $this->l('Displays categories with correct links.');

        $this->confirmUninstall = $this->l('Are you sure you want to uninstall?');
    }

    public function install()
    {
        return parent::install() &&
               $this->registerHook('displayHome'); // 注册一个钩子，例如在首页显示
    }

    public function uninstall()
    {
        return parent::uninstall();
    }

    /**
     * 钩子方法，用于渲染模块内容
     * @param array $params
     * @return string
     */
    public function hookDisplayHome($params)
    {
        // 调用 renderWidget 方法来处理逻辑和渲染
        return $this->renderWidget(null, $params);
    }

    /**
     * 渲染模块内容的实际方法
     * @param string|null $hookName
     * @param array $configuration
     * @return string
     */
    public function renderWidget($hookName = null, array $configuration = [])
    {
        // 获取所有分类数据，包括嵌套结构
        $allCategories = Category::getNestedCategories(null, $this->context->language->id);

        // 将分类数据和 Link 对象赋值给 Smarty
        $this->context->smarty->assign(array(
            'allCategories' => $allCategories,
            'link' => $this->context->link, // 关键：将 Link 对象赋值给 Smarty
        ));

        // 渲染模块的 Smarty 模板
        return $this->fetch('module:'.$this->name.'/views/templates/widget/block.tpl');
    }
}

<div class="custom-category-list">
    <h2>所有分类</h2>
    <ul>
        {foreach from=$allCategories item=mainCategory}
            <li>
                <a href="{$link->getCategoryLink($mainCategory.id_category, $mainCategory.link_rewrite)|escape:'html':'UTF-8'}" 
                   title="{$mainCategory.name|escape:'htmlall':'UTF-8'}">
                    {$mainCategory.name|escape:'htmlall':'UTF-8'}
                </a>

                {if isset($mainCategory.children) && !empty($mainCategory.children)}
                    <ul>
                        {foreach from=$mainCategory.children item=subCategory}
                            <li>
                                <a href="{$link->getCategoryLink($subCategory.id_category, $subCategory.link_rewrite)|escape:'html':'UTF-8'}"
                                   title="{$subCategory.name|escape:'htmlall':'UTF-8'}">
                                    {$subCategory.name|escape:'htmlall':'UTF-8'}
                                </a>
                            </li>
                        {/foreach}
                    </ul>
                {/if}
            </li>
        {/foreach}
    </ul>
</div>