<?php
$json = '{
"badging": [
    {
        "event": [
            {
                "eventName": "Covent Garden",
                "numberOfRooms": "1",
                "mainLang": "xx",
                "timeZone": "saas"
            }
        ]
    },
    {
        "names": [
            {
                "id": "1",
                "fName": "Daniel",
                "pos": "King"
            },
            {
                "id": "2",
                "fName": "Dasha",
                "pos": "Queen"
            }
        ]
    }
]
}';
$list = json_decode($json, TRUE);
echo $list['badging'][1]['names'][0]['fName'], PHP_EOL;
echo $list['badging'][1]['names'][1]['fName'];

Daniel
Dasha