Delete category and Products By Ids in Magento by following the steps:

1 - Deleting Category: send category id with Query String to controller such as

• Then write the controller as

  public function deletcatAction(){
      Mage::register('isSecureArea', 1);
      $categoryId = $_REQUEST['id'];
      $category   = Mage::getModel('catalog/category')->load($categoryId);
      try{
      $category->delete();
      }
      catch (Exception $e){
          echo $e->getMessage();
          }
      }

• Deleting Products:

• send category id with Query String to controller such as

• Then write the controller as

  public function deletprdctAction(){
      Mage::register('isSecureArea', 1);
      $productId = $_REQUEST['id'];
      $product   = Mage::getModel('catalog/product')->load($productId);
      try{
      $product->delete();
      $this->_redirect('manager/account/dashboardedit');
      }
      catch (Exception $e){
          echo $e->getMessage();
          }
      }