Quikr : Element not found exception while accessing 2nd link

Hi,
I tried for exercise "Click on every link one by one - Qukir.com".

Quikr.com : Able to click on first link back and then come and get stopped with exception "org.openqa.selenium.StaleElementReferenceException: Element not found in the cache - perhaps the page has changed since it was looked up" (but able to read all links names without clicks). Also tried to use webdriverwait for alerts to handle new popup window but not succeeded.

Can you please check following code and let me know the reason or suggests me better way:

import java.util.List;
import java.util.concurrent.TimeUnit;

//import org.openqa.selenium.Alert;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.firefox.FirefoxDriver;
//import org.openqa.selenium.support.ui.ExpectedConditions;
//import org.openqa.selenium.support.ui.WebDriverWait;

public class QuickrClickLink {

public static void main(String[] args) {

WebDriver driver = new FirefoxDriver();
driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);
driver.manage().window().maximize();

driver.navigate().to("http://www.quikr.com");

driver.findElement(By.className("bodynew"));

driver.findElement(By.xpath(".//*[@id='csclose']/strong")).click();

/* WebDriverWait wait = new WebDriverWait(driver,20);

wait.until(ExpectedConditions.alertIsPresent());

driver.switchTo().alert().accept();

driver.switchTo().defaultContent();
*/

driver.findElement(By.xpath(".//*[@id='main-container']/div[3]/div[2]"));
List<WebElement> links= driver.findElements(By.className("CategoryName"));
System.out.println(links.size());

for(int i=0;i<links.size();i++){
String linkname= links.get(i).getText();
System.out.println(i+" : "+linkname);

links.get(i).click();
System.out.println(driver.getTitle());
driver.navigate().back();

//driver.findElement(By.className("bodynew"));

driver.findElement(By.xpath(".//*[@id='csclose']/strong")).click();

}


}

}