Newsmag. Show category and subcategory on module.

Hi. I have two questions if I may.

First of all. In order to show category on modules we use echo $this->get_category(). However, if you need to show both category and subcategory on module, what do you use and how?

I have tried :

<?php
$categories = get_the_category();
$separator = ' ';
$output = '';
if($categories){
foreach($categories as $category) {
$output .= 'term_id ).'" class= "cats" title="' . esc_attr( sprintf( __( "View all posts in %s" ), $category->name ) ) . '">'.$category->cat_name.''.$separator;
}
echo trim($output, $separator);
}
?>

It works fine, but only for the theme pages (authors, categories, search etc.). The modules just ignoring the php and do not show any category/subcategory on the pages created through visual composer.

Second question. In order to get rid of the title tool-tips I have used some JS snippets.

var imgs = document.getElementsByTagName('img');
for (var i = 0; i < imgs.length; i++) {
imgs[i].removeAttribute('title');
}
var alinks = document.getElementsByTagName("a"); for (var i = 0; i < alinks.length; i++) { alinks[i].removeAttribute("title"); }

Or

var titled = document.querySelectorAll('[title]'); // gets all elements with a 'title' attribute, as long as the browser supports the css attribute-selector
var numTitled = titled.length;

for (i=0; i<numTitled; i++){
titled[i].setAttribute('data-title',titled[i].title); // copies from 'title' to 'data-title' attribute
titled[i].removeAttribute('title'); // removes the 'title' attribute
}

They both work fine. However, after Ajax (load more, filters, mega menu etc.) they come back. So, basically JS resets after the ajax process. Is it possible to somehow implement JS so it works even after ajax?

Any help would be appreciated. Thank you in advance.