Seeking general advice: is there a better way to echo dynamic HTML than heredoc? (smarty / php / html)

Project: To create dynamic multi page form that populates the fields in different ways depending on various situations.

Context: Using CMSMS and Smarty tags to insert PHP into the requried pages. Each single page of the form is being built using a single smarty

Current Method: Using smarty tags, I am writing large chunks of HTML echoed in heredoc notation. When I reach a part of the form that needs to be dynamically genearted (such as a drop down menu) I escape the heredoc, write the PHP (using standard echo functions to generate the HTML required for that form element) then return to heredoc for more chunks of HTML.

Suspicion: this is inelegant, messy, tedious and just feels wrong.

Request: Any idea of a better way of doing this?

EDIT: An example of a chunk of my current setup, here you can see an initial chunk of static HTML is echoed - (the start of the form, and the first question) then a drop down menu which requires dynamic generation depending on the data that exists in the SESSION variables. After this, the heredoc resumes and echos more static HTML:

echo <<<EOD
<form id="myform" method="post" action="?page=2">
<div >

<div >
  <div ><label for="sv_01">Question?</label> <input type="text" name="sv_01" value="$sv_01" size="10" maxlength="10" /></div>
    <div ><label for="sv_02">What Year?</label>
EOD;
        echo '<select name="sv_02">';  
        $vars = array(
        '-Year' => 'Year',
        '-2012' => '2012', 
        '-2011' => '2011', 
        '-2010' => '2010', 
        '-2009' => '2009', 
        '-2008' => '2008', 
        '-2007' => '2007', 
        '-2006' => '2006', 
        '-2005' => '2005', 
        'Pre 2005' => 'Pre 2005', 
        );

        foreach($vars as $val => $name){
          if($_SESSION['sv_02'] == $val){
            echo '<option value="' . substr($val, 0, 1) . '" selected>' . $name . '</option>';
          } else {
            echo '<option value="' . substr($val, 0, 1) . '">' . $name . '</option>';
          }
        }

        echo '</select></div>';
echo <<<EOD

  <div ><br /> <label for="sv_04">Another question</label> <input type="text" name="sv_04" value="$sv_04" size="10" maxlength="10" />%</div>
    <div ><label for="sv_07">When was the data collected?</label> 
EOD;
        echo '<select name="sv_07">';  
        $vars = array(
        '-Month' => 'Month',
        '-January' => 'January', 
        '-February' => 'February', 
        '-March' => 'March', 
        '-April' => 'April', 
        '-May' => 'May', 
        '-June' => 'June', 
        '-July' => 'July', 
        '-August' => 'August', 
        '-September' => 'September', 
        '-October' => 'October', 
        '-November' => 'November', 
        '-December' => 'December', 
        );

        foreach($vars as $val => $name){
          if($_SESSION['sv_07'] == $val){
            echo '<option value="' . substr($val, 0, 1) . '" selected>' . $name . '</option>';
          } else {
            echo '<option value="' . substr($val, 0, 1) . '">' . $name . '</option>';
          }
        }

        echo '</select><select name="sv_08">';

        $vars = array(
        '-Year' => 'Year',
        '-2012' => '2012', 
        '-2011' => '2011', 
        '-2010' => '2010', 
        '-2009' => '2009', 
        '-2008' => '2008', 
        '-2007' => '2007', 
        '-2006' => '2006', 
        '-2005' => '2005', 
        'Pre 2005' => 'Pre 2005', 
        );

        foreach($vars as $val => $name){
          if($_SESSION['sv_08'] == $val){
            echo '<option value="' . substr($val, 0, 1) . '" selected>' . $name . '</option>';
          } else {
            echo '<option value="' . substr($val, 0, 1) . '">' . $name . '</option>';
          }
        }

        echo '</select></div>'; 

echo<<<EOD     


<div ><input type="submit" value="Continue" /></div>
</div>

</div>
</form>
EOD;
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