M2 - Get all categories from cross sell products

[Purple]

I have a specific thing that I want to make because I can't find a extension that comes close to what i need.

On this page: https://www.bhphotovideo.com/c/product/1318277-REG/canon_eos_rebel_t7i_dslr.html

When you click next to Recommended Accessories on "View all" you see a list of all compatible accessories for the product.

I want to make such thing with the cross sell products in Magento, I managed to get the cross sell products id and the categories where they in.

<?php
	//$myBlock = \Magento\Framework\App\ObjectManager::getInstance()->get('Mageplaza\HelloWorld\Block\HelloWorld');

	$crossSellProducts = $_product->getCrossSellProducts();	

	if( $crossSellProducts != "") {
		foreach ($crossSellProducts as $crossSellProduct) {

		$categoryCollectionCross = $crossSellProduct->getCategoryCollection();
?>
		Crosssell product: <?php echo $crossSellProduct->getSku(); ?><br>
		<?php 
			foreach ($categoryCollectionCross as $categoryCollectionCrossItem) { 
				$crossCategoryId = $categoryCollectionCrossItem->getId();
				$_objectManagerCat = \Magento\Framework\App\ObjectManager::getInstance();
				$categoryNameAv = $_objectManagerCat->create('Magento\Catalog\Model\Category')->load($crossCategoryId);
		?>
				Categorie ID: <?php echo $crossCategoryId; ?><br>
				Categorie Name: <?php echo $categoryNameAv->getName(); ?><br>
		<?php 
			}       
		echo "<br>";
		}
	}
?>

I know that making direct use of the Object Manager is not ideal, but I don't know a way to make it work with DI.

First thing I need is a list of the categories from the cross sell products so I can make navigation menu. But I don't want double categories.

Is there anyone who can help me with that?

[Sunil Patel]

Hello @Purple 

make one helper file and pass argument as category id.

in that helper file you will do what ever logic and call that helper into that file.