Return a Json file via get request - php

Question

(ionic 3 app)
let me walk you through, whats going on here.
i have a file information.json, which contains information about various categories.
{
"items": [
{
"name":"Phones and Tablets",
"category_id": "20",
"image": "http://somesite/image/cache/catalog/menu-icons/phone-tablet-icon-500x500.png",
"children": [
{
"name": "Smartphones",
"category_id": "60"
},
{
"name": "Tablets",
"category_id": "62"
},
{
"name": "Accessories",
"category_id": "63"
},
{
"name": "Basic Gsm Phones",
"category_id": "64"
}
]
},
which is just sitting there looking pretty in main directory on my site.
when i maka a get request.
var headers = new Headers();
headers.append('accept', 'application/json');
let options = new RequestOptions({ headers: headers, });
this.http.get("http://somesite/information.json", options)
.map(data => data.json().items)
.subscribe(data => {
this.information = (data);
console.log(this.information);
}
)}
i get CORS error in console.
Failed to load http://somesite/information.json: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:8100' is therefore not allowed access.
i have a Moesif origin & Cross changer chrome extension, when i enable that then everything works fine in browser.
when i build/run the app on android everything seems to work fine.
but when i run the same app on ios, it doesn't seem to get any response.
i dont know if ios block all CORS by default or something.
i tried fiddling around with .htaccess file of my site, i included
Headers Allow-Access-Control-Origin "*", which seems to work for only 1 request, so i was able to get categories information. but all other get requests from my app became invalid. currently i am looking around to set up a PHP file with headers information so when i make a get request to php, it echos out that file information.json , but the problem is i just dont know how to set it up properly.
if you guys have any other solution for this problem, feels free to share them.
thanks.