Unfortunately, antibiotics are the most effective treatment for infections. If the infection is caused by ecoli, drinking cranberry juice can interfere with the bacteria's adhesion mechanisms inside the urethra.
Drinking lots of water is one common home remedy. Another is cranberry juice. There are also some types of supplements that supposedly give you the power of cranberries and which can be bought over the counter.
To cure a bladder infection without relying to medications one should consider their diet and fluid intake. You should drink lots of water and coconut juice in order to somehow flush out the bacteria as well as improve the circulation. Having enough rest and proper sleep can also help.