[Kingunit]

This at OnPlayerConnect:

pawn Код:

new string1[128], name[24];
    GetPlayerName(playerid, name, sizeof(name));
    label[playerid] = format(string1, sizeof(string), "%s",name);
    Create3DTextLabel(string1,0xFFFFFFFF,name,130,0,1);
    Attach3DTextLabelToPlayer(label[playerid], playerid, 0.0, 0.0, 0.7);

Ontop of your script:

pawn Код:

new Text3D:label[MAX_PLAYERS];

NOTE: This will probably work if you disable all nametags first.

OnPlayerDisconnect:

pawn Код:

Delete3DTextLabel(label[playerid]);