XML attribute value to pattern match of the replace f

Dear Team,

How can I assign the attribute value to pattern of the replace function,
kindly guide me.

Input XML:
<caseref party1="Drury" party2="Secretary of State for the Environment, Food
and Rural Affairs">Drury v Secretary of State for the Environment, Food and
Rural Affairs [2004] EWCA Civ 200; [2004] 1 W.L.R. 1906 </caseref>

XSL:
<hov:template match="caseref">
<hov:element name="caseref"><hov:value-of select="replace(.,
'(@party1.*?@party2)', '&lt;cite&gt;$1&lt;/cite&gt;')"/></hov:element>
</hov:template>

Needed XML:
<caseref party1="Drury" party2="Secretary of State for the Environment, Food
and Rural Affairs"><cite>Drury v Secretary of State for the Environment,
Food and Rural Affairs</cite> [2004] EWCA Civ 200; [2004] 1 W.L.R. 1906
</caseref>

Note: I have defined in char-map for &lt; and &gt;

Thanks,
Selva


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