set dataType: json
in you jquery call
As follows
$.ajax({
type:'POST',
url:'../php/anmelden_info.php',
data:{ kat : 'Freizeitfussballer'},
dataType: json,
success: function(data){
console.dir(data);
}
});
or if it not worked try this
$.ajax({
type:'POST',
url:'../php/anmelden_info.php',
data:{ kat : 'Freizeitfussballer'},
dataType: json,
success: function(data){
data = JSON.parse(data);
console.dir(data);
}
});