Show Category Description in Grouped by Category view

Hi Hikashop
I've had a request from my client and need assistance. Can you let me know how to include the Category description in the Grouped by Category page view. This would be to add the category description to each displayed category and addtionally I need to move it under the list of products. This is from a menu item 'Hikashop Category Listing'. I have attached a screenshot of your demo view for Grouped by Category and our development site which is currently on localhost. I've indicated where I'm trying attempting to get the Category Description to display.
Many thanks for your help.

Hi Hikashop, apologies

Hi Hikashop
I've managed to get half way. I managed to move the category description on the main product listing, I've attached a screen shot (Screen Shot 2017-03-15 at 14.07.25).
I used the same coding in the Display > View > template > product > listing, this has worked, but it's missing the content. You can see in the second screenshot (Screen Shot 2017-03-15 at 14.07.06) that the category description div class is there, but not the content.
But I'm now struggling to see what it is I'm missing or need to adjust.

This is the coding I've added to Display > View > template > product > listing.

<div class="hikashop_category_description">
<?php
if($this->params->get('show_image') && !empty($this->element->file_path)){
jimport('joomla.filesystem.file');
if(JFile::exists($this->image->getPath($this->element->file_path,false))){
?>
<img src="<?php echo $this->image->getPath($this->element->file_path); ?>" class="hikashop_category_image" title="<?php echo $this->escape(@$this->element->file_description); ?>" alt="<?php echo $this->escape(@$this->element->file_name); ?>"/>
<?php
}
}
if($this->params->get('show_description',1)&&!empty($this->element->category_description)){
?>
<div class="hikashop_category_description_content">
<?php echo JHTML::_('content.prepare',$this->element->category_description); ?>
</div>
<?php
}
?>
</div>

Thanks Nicolas, that worked perfectly.