code: public static SelectOptions getSiteSelectOptionsStatic(CmsObject cms, String wpSite, Locale locale) {
  
          List<String> options = new ArrayList<String>();
          List<String> values = new ArrayList<String>();
          int selectedIndex = 0;
  
          List<CmsSite> sites = OpenCms.getSiteManager().getAvailableSites(
              cms,
              true,
              false,
              cms.getRequestContext().getOuFqn());
          if (CmsStringUtil.isNotEmptyOrWhitespaceOnly(wpSite) && !wpSite.endsWith("/")) {
              wpSite += "/";
          }
  
          Iterator<CmsSite> i = sites.iterator();
          int pos = 0;
          while (i.hasNext()) {
              CmsSite site = i.next();
              String siteRoot = site.getSiteRoot();
              if (!siteRoot.endsWith("/")) {
                  siteRoot += "/";
              }
              values.add(siteRoot);
              options.add(CmsWorkplace.substituteSiteTitleStatic(site.getTitle(), locale));
              if (siteRoot.equals(wpSite)) {
                  // this is the user's currently chosen site
                  selectedIndex = pos;
              }
              pos++;
          }
  
          if (sites.size() < 1) {
              // no site found, assure that at least the current site is shown in the selector
              String siteRoot = cms.getRequestContext().getSiteRoot();
              CmsSite site = OpenCms.getSiteManager().getSiteForSiteRoot(siteRoot);
              if (!siteRoot.endsWith("/")) {
                  siteRoot += "/";
              }
              String title = "";
              if (site != null) {
                  title = site.getTitle();
              }
              values.add(siteRoot);
              options.add(title);
          }
          SelectOptions selectOptions = new SelectOptions(options, values, selectedIndex);
          return selectOptions;
      }
docs: Gets the options for the site selector.<p>
  
  @param cms the CMS context
  @param wpSite the selected site
  @param locale the locale for the select options
  
  @return the options for the site selector