[antonio112]

pawn Код:

ShowPlayerDialog(playerid, DIALOG_KAMION, DIALOG_STYLE_LIST,"Izaberite liniju kojom zelite prevoziti naftu", "San Fierro - Los Santos\nSan Fierro - Las Venturas\nSan Fierro - Los Santos - Las Venturas\n", "Izaberi", "Odustani");

You had to add "\n" at the end of your 'text'.