Browser compatibility for button - html

Question

I have the following html:
<div class="awpcp-subtitle">Contact Information
</div>
Contact $adcontact_name
<a href="tel:$adcontactphone">
<div class="phone">$adcontactphone
</div>
</a>
<div class="location">
<Location: </label> London, UK</div>
This makes a button link to dialing screen on mobile, with the number displayed on screen.
It works fine in Android, on Chrome/ Firefox, but as soon as I try it on an Apple phone on Safari, instead of just linking to dialing screen with the number displayed, it asks if I want to dial this:
<br><label>,hone<label>07945xxxx
When I press yes, it says it can't dial:
<br><label>,hone<label>07945xxxx
For obvious reasons in that it can't dial a code.
This must be a Safari iPhone/Mac issue, and what on earth does 'hone' mean anyway?
So I tried this html after the tag in my header.php, to make my site browser compatible.
<script
src="css_browser_selector.js"
type="text/javascript"></script>
This didn't work for the phone issue (there are others but let's stick to this for now.)
So how do I get apple iPhone, using Safari browser, to perform the same simple task as Firefox, Chrome, Android etc.
Perhaps there is a way to hide
<br><label.....
Like:
.div class ["<BR><label..."]
{display: none}
? It's behaving like published text so treat it as such?
I came across this but not sure what to do with it or if it is the right code? I'm getting the same issue with Google maps
"<"followedby"!"<br/><label>Phone:
</label>""followedby">"
"<"followedby"!"<br/>.
<label>Location:
</label>""followedby">"
But
$adcontactphone
Represents generic phone as well as specific phone number -including label tags

Answer 1

Based on the link provided in the comments I can deduce that $adcontactphone is being assigned the following value:
<br/><label>Phone:</label> 7576XXXXXX
You can see that string contains valid html tags, but then you are using $adcontactphone inside an href attribute:
<a href="tel:$adcontactphone">
...
</a>
This results in the following html after interpolating the variable:
<a href="tel:<br/><label>Phone:</label> 7576XXXXXX">
...
</a>
Many browsers will not consider this as a usable value for href. Some browsers may be made to filter out tags inside the attribute and others may not. This is not a browser compatibility issue because each browser is free to handle this invalid attribute in its own way.
If you fix $adcontactphone to contain just the phone number you will find that the link will start working in most browsers. The result you are aiming for would be this:
<a href="tel:7576XXXXXX">
...
</a>
There are also other invalid html problems that should be fixed to be sure that this section of your page is consistent across all browsers. For example:
<div class="location">
<Location: </label> London, UK</div>
You have an unmatched < here, also Location is not a supported html tag so some browsers may not like that.
Maybe it should look like this?
<div class="location">
<label>Location:</label> London, UK
</div>