-(NSString *)setDateInFormat:(NSString *)strTxt

{

    NSArray *arr = [strTxt componentsSeparatedByString:@”:”];

    NSString *str = [arr objectAtIndex:0];

    if ([str length] < 2)

    {

        if (![str hasPrefix:@”0″])

        {

            str = [@”0″ stringByAppendingString:str];

            strTxt = str;

            return [strTxt stringByAppendingString:[NSString stringWithFormat:@”:%@”,[arr objectAtIndex:1]]];

        }

    }

    return strTxt;

}

Don’t worry if date/string has 10:00 format, it will leave as it is because it is already in correct format.